Isotopes of Osmium. The chemical symbol for Osmium is Os. Osmium Element: Osmium Element in Periodic Table | Atomic Number Atomic Mass Osmium has an atomic mass of 190.23 u. Electronegativity according to Pauling Density is determined by mass over volume. Osmium has a bluish-silvery lustre. Learn the uses of osmium, density of osmium & many more. Video Are you having trouble understanding the basics of atomic elements? The other natural isotope, 186 Os, has an extremely long half-life (2×10 15 years) and for practical purposes can be considered to be stable as well. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. Does The Following Reaction Absorb Or Relcasc Cnergy? Electrons are lighter by a factor of almost 2000 so don’t really matter. Atomic Mass 190,23 Learn more about the atomic mass. The electronic configuration of the elements determines the way in which the electrons are structured in the atoms of an element. Osmium metal is a bluish white, lustrous, extremely hard, and brittle even at high temperatures. In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all … ››More information on molar mass and molecular weight. Atomic number. Mol You May Find Additional Useful Data In The ALEKS Data Tab. At this time, osmium had the largest uncertainty among all standard atomic weights, equalled with lead (for which, however, the atomic weight is affected by natural variability, not applicable to osmium). It is very densest metal, even little more than iridium (22.56 g/cm 3).. In 1969, the Commission recommended A r (Os) = 190.2(l). Atomic mass. State at 20 °C Solid Discovery Discovered By: Smithson Tenant Year: 1804 Location: England Want to learn more details and data about Osmium (Os)? Osmium is non-toxic in its crystalline form as long as a temperature of 400 °C is not exceeded. The most abundant stable isotope is osmium-192. There are six stable isotopes of osmium, osmium-184, osmium-187, osmium-188, osmium-189, osmium-190 and osmium-192. Question: Consider The Following Data For Osmium: Atomic Mass 190.23 2 Mol Electronegativity 2.20 Electron Affinity 106.1 Mol KJ Ionization Energy 840. 190.2 g.mol-1. Osmium is a hard, brittle, bluish-white transition metal in the platinum group that is found as a … The mass of an atom is determined by how many heavy particles (protons and neutrons) are in the nucleus. REFERENCES [1]. chemical properties, health and environmental effects of osmium. The mean radius of osmium is 130 pm, its atomic radius or Bohr radius is 185 pm, and its covalent radius is 128 pm. Osmium is a lustrous & silvery metal taking a spot in the periodic table with an atomic number of 76. Osmium has the atomic number 76 and an atomic mass of 190.23 u. Osmium (76 Os) has seven naturally occurring isotopes, six of which are stable: 184 Os, 187 Os, 188 Os, 189 Os, 190 Os, and (most abundant) 192 Os. Mol Heat Of Fusion 31. Osmium has seven naturally occurring isotopes. Name Origin Greek: osmê (odor). The radioactive isotope of osmium is osmium-186 and has a very long half-life (2 × 10 15 years). The electron configuration of osmium is [Xe] 4f145d66s2. Check my Elements Comprehensive List. It has the lowest vapor pressure and the highest melting point of the platinum group. 76. The chemical element Osmium is classed as hard, brittle, bluish-white transition metal.Its atomic number is 76 and represented by the symbol Os. Its electron configuration is [Xe] 4f14 5d6 6s2. The electronic configuration of the elements determines the way in which the electrons lighter... 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