Neptunium
Neptunium | |
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Atomic Number: 93 Atomic Weight: 237 Melting Point: 917 K (644°C or 1191°F) Boiling Point: 4175 K (3902°C or 7056°F) Density: 20.25 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 7 Group Number: none Group Name: Actinide |