Terbium was discovered by Carl Mosander at 1843 in Sweden.
Origin of name: named after "Ytterby", a town in Sweden.
Atomic Number: 65
Atomic Weight: 158.92535
Melting Point: 1629 K (1356°C or 2473°F)
Boiling Point: 3503 K (3230°C or 5846°F)
Density: 8.23 grams per cubic centimeter
Phase at Room Temperature: Solid
Element Classification: Metal
Period Number: 6 Group Number: none Group Name: Lanthanide