Atomic Number 45     Atomic Mass 102.905500     Density 12.4 g/mL

State solid     Color silvery white     Electronegativity 2.28

Melting Point 1966°C     Boiling Point 3727°C

Natural Isotope Rh-103 100%

Abbreviated Electron Configuration [Kr] 4d⁸ 5s¹

Discovered by William Wollaston in 1803.