polonium

Name polonium
Symbol Po
Atomic Weight 208.98
Atomic Number 84
CAS ID 7440-08-6
Group Number 16
Group Name Chalcogen
Period Number 6
Origin of Name After the country "Poland."
Year Discovered 1898
Discovery Credits Marie Curie at Paris, France.
Class Metallic
Color Silvery
Standard State Solid at 77 F & 298 K
Description Radioactive silvery-gray metal. Soluble in dilute acids. Used as heat source in space equipment and as source of alpha radiation for research. Occurs in trace amounts in uranium ores.

Back to Elements Table Page