Rhodium

Symbol: Rh
Atomic number: 45
Category: transition metals
Group: 9
Period: 5
Block: d
Atomic weight: 102.9055 g/mol
Electrons per shell: 2, 8, 18, 16, 1
CAS number: 7440-16-6
Phase: solid
Density: 12.41 kg/l (near room temperature)
Melting point: 2237 K (1964C, 3567F)
Boiling point: 3968 K (3695C, 6683F)
Crystal structure: cubic face centered
Oxidation states: 4, 3, 2, 1
Electronegativity: 2.28 (Pauling scale)
Name's origin: rhodom
Name's meaning: a Greek word for rose
Facts:
- is used in automobiles as a catalytic converter
- is a hard silvery white and durable metal that has a high reflectance
- does not normally form an oxide, even when heated
- is a rare, silvery-white, hard transition metal
- is found in platinum ores
- is typically the most expensive precious metal