Promethium
Promethium | |
|
Atomic Number: 61 Atomic Weight: 145 Melting Point: 1315 K (1042°C or 1908°F) Boiling Point: 3273 K (3000°C or 5432°F) Density: 7.26 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 6 Group Number: 1 Group Name: Lanthanide |