Rhodium is a hard, silvery metal discovered in 1804 by William Hyde Wollaston. It has a high melting point of 2237 K and boiling point of 3968 K, with a density of 12450 kg/m3. Rhodium does not form an oxide even when heated, is not attacked by most acids, and has a higher melting point but lower density than platinum.

1. 45
Rodio - Rhodium
Mass: 102,90550 u
[Kr] 5s1
4d8
Melting point: 2237 K
Boiling point: 3968 K
Density: 12450 kg/m3
Discovery: William Hyde Wollaston (1804)
Rhodium is a hard, silvery, durable metal that has a high reflectance.
Rhodium metal does not normally form an oxide, even when heated.
Rhodium has both a higher melting point and lower density than platinum.
It is not attacked by most acids: it is completely insoluble in nitric acid
and it is solved slightly in aqua regia.