Neptunium Element

Neptunium
Atomic Number	: 93
Atomic Weight	: 237
Boiling Point	: 3902^oC
Melting Point	: 644^oC
Phase at Room Temperature:	: Solid
Element Classification:	: Metal
Period Number:	: 7
Discovered Year:	: 1940
Discovered by:	: Edwin McMillan and Philip Abelson .