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Platinum,  78Pt
Platinum crystals.jpg
General properties
Appearance grayish white
Staundart atomic wecht (Ar, staundart) 195.084(9)[1]
Platinum in the periodic cairt
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Airn Cobalt Nickel Capper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Siller (element) Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gowd Mercur (element) Thallium Leid (element) Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium
Pd

Pt

Ds
iridiumplatinumgowd
Atomic nummer (Z) 78
Group group 10
Period period 6
Element category   transition metal
Block d-block
Electron confeeguration [Xe] 4f14 5d9 6s1
Electrons per shell
2, 8, 18, 32, 17, 1
Pheesical properties
Phase (at STP) solit
Meltin pynt 2041.4 K ​(1768.3 °C, ​3214.9 °F)
Bylin pynt 4098 K ​(3825 °C, ​6917 °F)
Density (near r.t.) 21.45 g/cm3
when liquid (at m.p.) 19.77 g/cm3
Heat o fusion 22.17 kJ/mol
Heat o vapourisation 469 kJ/mol
Molar heat capacity 25.86 J/(mol·K)
Vapour pressur
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 2330 (2550) 2815 3143 3556 4094
Atomic properties
Oxidation states 6, 5, 4, 3, 2, 1, −1, −2, −3
(mildly basic oxide)
Electronegativity Pauling scale: 2.28
Atomic radius empirical: 139 pm
Covalent radius 136±5 pm
Van der Waals radius 175 pm
Coloyr lines in a spectral range
Spectral lines o Infobox platinum
Miscellanea
Creestal structurface-centred cubic (fcc)
Face-centered cubic creestal structur for platinum
Speed o soond thin rod 2800 m/s (at r.t.)
Thermal expansion 8.8 µm/(m·K) (at 25 °C)
Thermal conductivity 71.6 W/(m·K)
Electrical resistivity 105 n Ω·m (at 20 °C)
Magnetic orderin paramagnetic
Young's modulus 168 GPa
Shear modulus 61 GPa
Bouk modulus 230 GPa
Poisson ratio 0.38
Mohs haurdness 4–4.5
Vickers haurdness 549 MPa
Brinell haurdness 392 MPa
CAS Nummer 7440-06-4
History
Diskivery Antonio de Ulloa (1735)
First isolation Antonio de Ulloa (1735)
Main isotopes o platinum
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct
190Pt 0.014% 6.5×1011 y α 186Os
192Pt 0.782% >4.7×1016 y α 188Os
193Pt syn 50 y ε 193Ir
194Pt 32.967% stable
195Pt 33.832% stable
196Pt 25.242% stable
198Pt 7.163% >3.2×1014 y α 194Os
ββ 198Hg
| references | in Wikidata

References

Thir references will appear in the airticle, but this list appears anerly on this page.
  1. Meija, J.; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 265–91. doi:10.1515/pac-2015-0305.