Smith,+Tyler

Platinum:Pt



Atomic weight:195.078

Atomic number:78

Melting point 1768.3

Boiling point: 3825 oC

Protons: 78

Neutrons: 117

Electrons: 78

Density: 21090 kg m-3

Electron configuration and orbital: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d8

Valence electrons:2,4

Cost or value: $1639 per ounce

Found in: Platinum is found in other elements such as gold, silver, copper, palladium, ruthenium, rhodium, iridium, and osmium. Found in ores such as sperrylite (platinum arsenide, PtAs2 )and cooperite (platinum sulphide, PtS)

Mined in: Columbia, the USA, Ontario (Canada), and Urals (USSR)



Industrial or commercial uses: jewellery, in dentistry, thermocouple elements, and electrical contacts.

Physical properties-Molar volume: 9.09, Velocity of sound: 2680 m s-1, Thermal conductivity: 72 W m-1 K-1 , and Liquid range: 2056.6 K

 Chemical reactions: Pt(s) + Cl2(g) → PtCl 2 (s) (dark red or olive green) Pt(s) + 2Br2(g) → PtBr 4(s) (brown black)

Discovered: platinum was rediscovered in South America by Ulloa in 1735

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