The chemical symbol for Californium is Cf. The chemical symbol for Sulfur is S. Sulfur is abundant, multivalent, and nonmetallic. Titanium is a chemical element with atomic number 22 which means there are 22 protons and 22 electrons in the atomic structure. The difference between the neutron number and the atomic number is known as the neutron excess: D = N – Z = A – 2Z. It is obtained chiefly from the mineral cassiterite, which contains tin dioxide. In nuclear industry, especially artificial xenon 135 has a tremendous impact on the operation of a nuclear reactor. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. The chemical symbol for Gadolinium is Gd. The chemical symbol for Xenon is Xe. Radon is a chemical element with atomic number 86 which means there are 86 protons and 86 electrons in the atomic structure. By mass, aluminium makes up about 8% of the Earth’s crust; it is the third most abundant element after oxygen and silicon and the most abundant metal in the crust, though it is less common in the mantle below. Erbium is a chemical element with atomic number 68 which means there are 68 protons and 68 electrons in the atomic structure. Curium is a hard, dense, silvery metal with a relatively high melting point and boiling point for an actinide. To identify the stability of an isotope it is needed to find the ratio of neutrons to protons. It is the lichtest halogen an exists as a heichly toxic pale yellae diatomic gas at staundary condeetions . Nearly all technetium is produced synthetically, and only minute amounts are found in the Earth’s crust. The chemical symbol for Indium is In. The chemical symbol for Praseodymium is Pr. First off, it's fluorine and fluoride and not flourine and flouride. Tungsten is a chemical element with atomic number 74 which means there are 74 protons and 74 electrons in the atomic structure. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). These condensers use tubes that are usually made of stainless steel, copper alloys, or titanium depending on several selection criteria (such as thermal conductivity or corrosion resistance). Convert grams Fluorine to moles or moles Fluorine to grams ... of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. A freshly exposed surface of pure copper has a reddish-orange color. In nuclear reactors, promethium equilibrium exists in power operation. The small size of the fluorine atom makes it possible to pack a relatively large number of fluorine atoms or ions around a given coordination centre (central atom) where it forms many stable complexes—for example, hexafluorosilicate (SiF 6) 2− and hexafluoroaluminate (AlF 6) 3−. The chemical symbol for Neptunium is Np. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. The chemical symbol for Thulium is Tm. i think there would be: an atomic number of 17, there would be 17 protons, and there would . The chemical symbol for Uranium is U. Our Website follows all legal requirements to protect your privacy. See also: Atomic Mass Number – Does it conserve in a nuclear reaction? It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. The chemical symbol for Radium is Ra. This equilibrium also known as “samarium 149 reservoir”, since all of this promethium must undergo a decay to samarium. It is the lightest element in the halogen family. A nucleus with greater binding energy has a lower total energy, and therefore a lower mass according to Einstein’s mass-energy equivalence relation E = mc 2. Only fluorine-19 is stable and naturally occurring; therefore, fluorine is a monoisotopic and mononuclidic element, and only artificially produced fluorine isotopes have atomic masses other than 19. The misspelling is common, but the "u" comes before the "o" in both. The chemical symbol for Cerium is Ce. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. We assume no responsibility for consequences which may arise from the use of information from this website. The chemical symbol for Iodine is I. Iodine is the heaviest of the stable halogens, it exists as a lustrous, purple-black metallic solid at standard conditions that sublimes readily to form a violet gas. am i . This chart shows a plot of the known nuclides as a function of their atomic and neutron numbers. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. Discoverer: Priestley, Joseph and Scheele, Carl Wilhelm, Discoverer: Ramsay, William and Travers, Morris, Discoverer: Ramsay, Sir William and Strutt, John (Lord Rayleigh), Discoverer: Del Rio, Andrés Manuel (1801) and Sefström, Nils Gabriel (1830), Discoverer: Lecoq de Boisbaudran, Paul-Émile, Discoverer: Ramsay, Sir William and Travers, Morris, Discoverer: Bunsen, Robert Wilhelm and Kirchhoff, Gustav Robert, Discoverer: Perrier, Carlo and Segrè, Emilio, Discoverer: Reich, Ferdinand and Richter, Hieronymus, Discoverer: Müller von Reichenstein, Franz Joseph, Discoverer: Ramsay, William and Travers, Morris William, Discoverer: Kirchhoff, Gustav and Bunsen, Robert. Caesium has physical and chemical properties similar to those of rubidium and potassium. ›› Fluorine molecular weight. Although neodymium is classed as a rare earth, it is a fairly common element. Name: Fluorine Symbol: F Atomic Number: 9 Atomic Mass: 18.998404 amu Melting Point:-219.62 °C (53.530006 K, -363.31598 °F) Boiling Point:-188.14 °C (85.01 K, -306.652 °F) Number of Protons/Electrons: 9 Number of Neutrons: 10 Classification: Halogen Crystal Structure: Cubic Density @ 293 K: 1.696 g/cm 3 Color: Greenish Atomic Structure Scandium is a chemical element with atomic number 21 which means there are 21 protons and 21 electrons in the atomic structure. For other isotopes, the isotopic mass usually differs and is usually within 0.1 u of the mass number. The chemical symbol for Hafnium is Hf. Caesium is a soft, silvery-gold alkali metal with a melting point of 28.5 °C, which makes it one of only five elemental metals that are liquid at or near room temperature. The chemical symbol for Tungsten is W. Tungsten is a rare metal found naturally on Earth almost exclusively in chemical compounds. Classified as a halogen, Fluorine is a gas at room temperature. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. Discoverer: Coster, Dirk and De Hevesy, George Charles, Discoverer: Elhuyar, Juan José and Elhuyar, Fausto, Discoverer: Noddack, Walter and Berg, Otto Carl and Tacke, Ida. Neptunium is the first transuranic element. The chemical symbol for Fermium is Fm. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. See also: Mass Number. Neutron number is rarely written explicitly in nuclide symbol notation, but appears as a subscript to the right of the element symbol. Lanthanum is a chemical element with atomic number 57 which means there are 57 protons and 57 electrons in the atomic structure. The chemical symbol for Curium is Cm. A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere and is often used with other rare gases in fluorescent lamps. Because of its high chemical reactivity, barium is never found in nature as a free element. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. Oxygen is a chemical element with atomic number 8 which means there are 8 protons and 8 electrons in the atomic structure. Fluorine is a chemical element and it is a member of group 17 and period 2 in the periodic table. Density of Fluorine. Bromine is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas. Zinc is a chemical element with atomic number 30 which means there are 30 protons and 30 electrons in the atomic structure. If we add neutron, atomic number is not going to change, so it still would be Fluorine, but isotope of Fluorine with different atomic mass that would be equal 20. Approximately 60–70% of thallium production is used in the electronics industry. The chemical symbol for Platinum is Pt. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer (passivation) stabilizes the free metal somewhat against further oxidation. What is the mass # of a fluorine atom with 8 neutrons? The chemical symbol for Silver is Ag. ! The various species of atoms whose nuclei contain particular numbers of protons and neutrons are called nuclides. Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table). Nuclides that have the same neutron number but a different proton number are called isotones. Fluorine is an element with atomic number 9 and symbol F. Know the Uses of Fluorine, Chemical Properties of Fluorine, Atomic Mass of Fluorine & more at BYJU'S fluorine costs about 190 dollars per gram. The chemical symbol for Polonium is Po. Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. 32. Yttrium is a chemical element with atomic number 39 which means there are 39 protons and 39 electrons in the atomic structure. Chemically, indium is similar to gallium and thallium. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 electrons in the atomic structure. Europium is a chemical element with atomic number 63 which means there are 63 protons and 63 electrons in the atomic structure. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. When we use data that are related to certain product, we use only data released by public relations departments and allowed for use. A=Number of protons+ Number of neutrons. Fluorine is a chemical element with the symbol F and atomic number 9. The Cookies Statement is part of our Privacy Policy. 18.998 403 163(6) 1 Fluorine is a monoisotopic element and its atomic weight is determined solely by its isotope 19F. Fluorine atoms have 9 electrons and the shell structure is 2.7. It is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. Properties: Fluorine has a melting point of -219.62°C (1 atm), boiling point of -188.14°C (1 atm), density of 1.696 g/l (0°C, 1 atm), specific gravity of liquid of 1.108 at its boiling point, and valence of 1.Fluorine is a corrosive pale yellow gas. The chemical symbol for Einsteinium is Es. Fluorine's atomic number is 9 and its atomic mass is 19. As the maist electronegative element, it is extremely reactive: awmaist aw ither elements, includin some noble gases , form compoonds wi fluorine. Holmium is a relatively soft and malleable silvery-white metal. Significant concentrations of boron occur on the Earth in compounds known as the borate minerals. Zirconium is widely used as a cladding for nuclear reactor fuels. Molar mass of F = 18.9984032 g/mol. Discoverer: Davy, Sir H. and Thénard, L.-J. The chemical symbol for Bromine is Br. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity, behind only oxygen and fluorine. What is the mass (D) of one atom of 19F?What would be the mass (g) of this one atom of 19F?What would be the mass of 10 atoms of 19F? Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. For 63 Cu the atomic mass is less than 63 so this must be the dominant factor. Rhodium is a chemical element with atomic number 45 which means there are 45 protons and 45 electrons in the atomic structure. 2) You may not distribute or commercially exploit the content, especially on another website. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. Fluorine (symbol F) is a chemical element that is very poisonous. The longest-lived fluorine radionuclide with half-life of 109.77 min. Palladium is a chemical element with atomic number 46 which means there are 46 protons and 46 electrons in the atomic structure. It is one of the least reactive chemical elements and is solid under standard conditions. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. The atomic mass is carried by the atomic nucleus, which occupies only about 10-12 of the total volume of the atom or less, but it contains all the positive charge and at least 99.95% of the total mass of the atom. Atomic Mass Number – Does it conserve in a nuclear reaction? One atomic mass unit is equal to 1.66 x 10-24 grams. What is the mass number of a fluorine atom with 8 neutrons? Many other rare types of decay, such as spontaneous fission or neutron emission are known. The Element Fluorine - Known Isotopes. Fluorine (9 F) has 17 known isotopes, with atomic masses ranging from 14 F to 31 F (with the exception of 30 F), and two isomers (18m F and 26m F). Name: Fluorine Symbol: F Atomic Number: 9 Atomic Mass: 18.998404 amu Melting Point:-219.62 °C (53.530006 K, -363.31598 °F) Boiling Point:-188.14 °C (85.01 K, -306.652 °F) Number of Protons/Electrons: 9 Number of Neutrons: 10 Classification: Halogen Crystal Structure: Cubic Density @ 293 K: 1.696 g/cm 3 Color: Greenish Atomic Structure It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. The chemical symbol for Helium is He. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 electrons in the atomic structure. Scandium is a silvery-white metallic d-block element, it has historically been sometimes classified as a rare-earth element, together with yttrium and the lanthanides. The chemical symbol for Barium is Ba. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. Ruthenium is a rare transition metal belonging to the platinum group of the periodic table. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant. Bromine is a chemical element with atomic number 35 which means there are 35 protons in its nucleus.Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. The most probable fission fragment masses are around mass 95 (Krypton) and 137 (Barium). The chemical symbol for Chlorine is Cl. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. The chemical symbol for Beryllium is Be. SOURCE Atomic weights of the elements: Review 2000 by John R de Laeter et al. and Gay-Lussac, L.-J. Unstable isotopes decay through various radioactive decay pathways, most commonly alpha decay, beta decay, gamma decay or electron capture. 0 0. Fluorine - Fluorine - Production and use: Fluorspar is the most important source of fluorine. Berkelium is a chemical element with atomic number 97 which means there are 97 protons and 97 electrons in the atomic structure. The chemical symbol for Rhenium is Re. Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. The chemical symbol for Manganese is Mn. Californium is an actinide element, the sixth transuranium element to be synthesized, and has the second-highest atomic mass of all the elements that have been produced in amounts large enough to see with the unaided eye (after einsteinium). © 2019 periodic-table.org / see also One unified atomic mass unit is approximately the mass of one nucleon (either a single proton or neutron) and is numerically equivalent to 1 g/mol. In nuclear industry boron is commonly used as a neutron absorber due to the high neutron cross-section of isotope 10B. See also: Mass Number. Most of the isotope data on this site has been obtained from the National Nuclear Data Center.Please visit their site for more information.. Isotopes With A … There are two reasons for the difference between mass number and isotopic mass, known as the mass defect: Note that, it was found the rest mass of an atomic nucleus is measurably smaller than the sum of the rest masses of its constituent protons, neutrons and electrons. ›› Fluorine molecular weight. Classified as a halogen, Fluorine is a gas at room temperature. Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife. The bulk properties of astatine are not known with any certainty. If you continue to use this site we will assume that you are happy with it. Lutetium is a chemical element with atomic number 71 which means there are 71 protons and 71 electrons in the atomic structure. The chemical symbol for Cadmium is Cd. The chemical symbol for Gallium is Ga. Gallium has similarities to the other metals of the group, aluminium, indium, and thallium. Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily unreactive substances become reactive; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning. Being a typical member of the lanthanide series, europium usually assumes the oxidation state +3. For 12C the atomic mass is exactly 12u, since the atomic mass unit is defined from it. In some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. Radon is a radioactive, colorless, odorless, tasteless noble gas. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Its atomic number (which is the number of protons in it) is 9, and its atomic mass is 19. Californium is a chemical element with atomic number 98 which means there are 98 protons and 98 electrons in the atomic structure. Americium is a transuranic member of the actinide series, in the periodic table located under the lanthanide element europium, and thus by analogy was named after the Americas. Fluorine is a chemical element with symbol F and atomic number 9. What is Conservation of Atomic Number, Neutron Number and Mass Number - Definition, Arsenic - Mass Number - Neutron Number - As, Oxygen – Mass Number – Neutron Number – O. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. During the distillation calcium sulfate (CaSO4) is formed, which is insoluble in HF. The chemical symbol for Lead is Pb. fluorine-18 atom: ChEBI ID CHEBI:36939: Definition The radioactive isotope of fluorine with relative atomic mass 18.000938. The chemical symbol for Germanium is Ge. Indium is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust. If there are too many or too few neutrons for a given number of protons, the resulting nucleus is not stable and it undergoes radioactive decay. The chemical symbol for Fluorine is F. Atomic Mass of Fluorine Atomic mass of Fluorine is 18.9984 u. Thorium is a naturally-occurring element and it is estimated to be about three times more abundant than uranium. Samarium is a typical member of the lanthanide series, it is a moderately hard silvery metal that readily oxidizes in air. Mass number of it is 19. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. Fluorine is a monoisotopic element and its atomic weight is determined solely by its isotope 19 F. The Commission last revised the standard atomic weight of fluorine in 2013 based on the latest Atomic Mass Evaluation by IUPAP. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. The fluorine anion, F-, or any of the compounds containing the anion are termed fluorides. The unit of measure for mass is the atomic mass unit (amu). The chemical symbol for Boron is B. Francium is an alkali metal, that has one valence electron. Keeping in mind that its atomic number is 9, what can you infer about this atom? The commercial use of beryllium requires the use of appropriate dust control equipment and industrial controls at all times because of the toxicity of inhaled beryllium-containing dusts that can cause a chronic life-threatening allergic disease in some people called berylliosis. Beryllium is a chemical element with atomic number 4 which means there are 4 protons and 4 electrons in the atomic structure. In pure form, it is a highly toxic, reactive, yellowish-green gas. Density of Fluorine. Atomic number of Fluorine is 9 and it is indicated by the symbol is F. Fluorine belongs to halogen family. If a sulfur atom has 16 protons, 16 electrons, and 16 neutrons, its atomic mass is? Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. 2) You may not distribute or commercially exploit the content, especially on another website. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. Manganese is a chemical element with atomic number 25 which means there are 25 protons and 25 electrons in the atomic structure. Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. These have similar chemical properties, but palladium has the lowest melting point and is the least dense of them. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. what is the atomic number of this atom? Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. fluorine-18 atom: ChEBI ID CHEBI:36939: Definition The radioactive isotope of fluorine with relative atomic mass 18.000938. Actinium is a soft, silvery-white radioactive metal. The name xenon for this gas comes from the Greek word ξένον [xenon], neuter singular form of ξένος [xenos], meaning ‘foreign(er)’, ‘strange(r)’, or ‘guest’. The chemical symbol for Mendelevium is Md. The chemical symbol for Mercury is Hg. It is the lichtest halogen an exists as a heichly toxic pale yellae diatomic gas at staundary condeetions . The Cookies Statement is part of our Privacy Policy. The 13th most abundant element in the Earth's crust is fluorine. Thulium is an easily workable metal with a bright silvery-gray luster. The chemical symbol for Yttrium is Y. Yttrium is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a “rare-earth element”. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. Ii periodic table ke Group 7 me hae. For example, actinides with odd neutron number are usually fissile (fissionable with slow neutrons) while actinides with even neutron number are usually not fissile (but are fissionable with fast neutrons). What is the mass # of a fluorine atom with 8 neutrons? Element Mass Number Atomic Number Aluminum 27 13 Nitrogen 14 7 Helium 4 2 Fluorine 19 9 Which element has the… Get the answers you need, now! Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. The chemical symbol for Phosphorus is P. As an element, phosphorus exists in two major forms—white phosphorus and red phosphorus—but because it is highly reactive, phosphorus is never found as a free element on Earth. Neodymium is a soft silvery metal that tarnishes in air. Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides. Fermium is a chemical element with atomic number 100 which means there are 100 protons and 100 electrons in the atomic structure. Atomic Mass of Fluorine Atomic mass of Fluorine is 18.9984 u. Answer: 2 question What mass of xenon tetrafluoride, xef 4 , has the same number of fluorine atoms as 25.0 g of oxygen difluoride, of2? is a rare earth element with a metallic silver luster. Neon is a chemical element with atomic number 10 which means there are 10 protons and 10 electrons in the atomic structure. It is fairly soft and slowly tarnishes in air. Cadmium is a soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Sodium is a chemical element with atomic number 11 which means there are 11 protons and 11 electrons in the atomic structure. What is the mass # of a fluorine atom … The chemical symbol for Calcium is Ca. (1969), Discoverer: Scientists at Dubna, Russia (1967)/Lawrence Berkeley Laboratory (1970), Discoverer: Armbruster, Paula and Muenzenberg, Dr. Gottfried, Element Category: unknown, probably a transition metal, Discoverer: David Anderson, Ruhani Rabin, Team Updraft, Element Category: unknown, probably a post-transition metal, Discoverer: Hisinger, Wilhelm and Berzelius, Jöns Jacob/Klaproth, Martin Heinrich. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry. In nuclear industry gadolinium is commonly used as a neutron absorber due to very high neutron absorbtion cross-section of two isotopes 155Gd and 157Gd. Atomic number of Fluorine is 9 and it is indicated by the symbol is F. Fluorine belongs to halogen family. Major advantage of lead shield is in its compactness due to its higher density. Platinum is one of the least reactive metals. Fluorine was discovered by Henri Moissan (FR) in 1886. The name samarium is after the mineral samarskite from which it was isolated. Einsteinium is a chemical element with atomic number 99 which means there are 99 protons and 99 electrons in the atomic structure. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. A nucleus with greater binding energy has a lower total energy, and therefore a lower mass according to Einstein’s mass-energy equivalence relation E = mc 2. It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is used in steel alloys, including high-strength alloys and superalloys. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. Tantalum is a chemical element with atomic number 73 which means there are 73 protons and 73 electrons in the atomic structure. These two forces compete, leading to various stability of nuclei. if an atom has 17 electrons and its mass number is 35, calculate the following: number of protons, atomic number, and number of neutrons. The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The chemical symbol for Caesium is Cs. An atom of Fluorine has the atomic number 9 and the mass number 19 … The chemical symbol for Scandium is Sc. The chemical symbol for Protactinium is Pa. Protactinium is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. The chemical symbol for Arsenic is As. Nobelium can only be produced in supernova nucleosynthesis, from as early as 3000 BC 63. This unit is called the mole, and the number of certain isotope neutron! A sodium atom is 11 and its atomic mass is the mass # of a set of seventeen chemical in! At room temperature that evaporates readily to form a similarly coloured gas is never found in mineral oil is reactive. 84 electrons in the atomic structure, chemically similar elements between actinium and lawrencium in manufacture... 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