PLATINUM

Atomic Number: 78
Mass Number: 195.09
Electron Configuration: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f¹⁴5d⁸
Density: 21.45 g/cm³ at 20^oC
Crystal Structure: Face-Centered Cubic
Melting Point: 1772^oC
Atomic Radius: 139 pm
Important Oxidation States: +2, +3, +4