Template:Infobox platinum

Platinum, ₇₈Pt

Platinum
Pronunciation	/ˈplætɪnəm/ ​(PLAT-in-ǝm)
Appearance	grayish white
Standard atomic weight Ar, std(Pt)	7002195084000000000♠195.084(9)
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 iridium ← platinum → gowd
Atomic nummer (Z)	78
Group	group 10
Period	period 6
Block	d-block
Element category	Transeetion metal
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	−3, −2, −1, 0, +1, +2, +3, +4, +5, +6 (a mildly basic oxide)
Electronegativity	Pauling scale: 2.28
Atomic radius	empirical: 139 pm
Covalent radius	136±5 pm
Van der Waals radius	175 pm
Colour lines in a spectral range Spectral lines o platinum
Ither properties
Naitural occurrence	primordial
Creestal structur	​face-centred cubic (fcc)
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
Bulk 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 β−β− 198Hg

style="text-align:left"| data m.p. cat
	in	calc from C	diff	report	ref
C	1768.3	—	—
K	2041.4	2041.4	0
F	3214.9	3214.9	0
WD	!
input	C: 1768.3, K: 2041.4, F: 3214.9
comment

style="text-align:left"| data b.p. cat
	in	calc from C	diff	report	ref
C	3825	—	—
K	4098	4098	0
F	6917	6917	0
WD	!
input	C: 3825, K: 4098, F: 6917
comment

References

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