IRIDIUM

Atomic Number: 77
Mass Number: 192.20
Electron Configuration: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f¹⁴5d⁷
Density: 22.42 g/cm³
Crystal Structure: Face-Centered Cubic
Melting Point: 2410^oC
Atomic Radius: 136 pm
Important Oxidation States: +3, +4