Name: rhodium
Symbol: Rh
Atomic number: 45
Atomic weight: 102.90550 (2)
Group in periodic table: 9
Group name: Precious metal
Period in periodic table: 5
Block in periodic table: d-block
CAS registry ID: 7440-16-6
Rhodium metal is silvery white. Rhodium has a higher melting point and lower density than platinum. It has a high reflectance and is hard and durable. Upon heating it turns to the oxide when red and at higher temperatures turns back to the element. It is a major component of industrial catalytic systems such as the BP-Monsanto process.