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.

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