2007-05-03 00:24:36 · 2 answers · asked by toddhotmail 1 in Science & Mathematics ➔ Earth Sciences & Geology
The wikipedia says:
Rhodium is a hard silvery white and durable metal that has a high reflectance. Rhodium metal does not normally form an oxide, even when heated. Oxygen is absorbed from the atmosphere at the melting point of rhodium, but on solidification the oxygen is released. Rhodium has both a higher melting point and lower density than platinum. It is not attacked by acids: it is completely insoluble in nitric acid and slightly dissolves in aqua regia. A complete dissolution of rhodium in powder form is only obtained in sulfuric acid.
Phase: solid
Density (near r.t.) 12.41 g/cm^3
Liquid density at m.p. 10.7 g/cm^3
Melting point 2237 K
(1964 °C, 3567 °F)
Boiling point 3968 K
(3695 °C, 6683 °F)
Heat of fusion 26.59 kJ/mol
Heat of vaporization 494 kJ/mol
Heat capacity (25 °C) 24.98 J/mol/K
See the wiki page for more details
2007-05-03 00:33:50 · answer #1 · answered by Orinoco 7 · 0⤊ 0⤋
radiation level found in the element can be high when found in large quanities. thats physical.
2007-05-03 07:28:48 · answer #2 · answered by Anonymous · 0⤊ 0⤋