McGraw-Hill's AccessScience

Log In

< Back


Atomic Number	65

Atomic Symbol	Tb

Atomic Weight	158.92534 amu

Group	Rare Earth (Lanthanide Series)

Form	Solid

Density @ STP	8.23 g/cm³

Melting Point	1356 °C (1356 °F, 2472.8 °K)

Boiling Point	3230 °C (5846 °F, 3503.15 °K)

Heat of Fusion	10.15 kJ/mol

Heat of Vaporization	295 kJ/mol

First Ionization Potential	5.8639 eV

Specific Heat Capacity	0.182 J/g K

Ground State Electron Configuration	4f⁹ 5s² 5p⁶ 6s²

Oxidation State(s)	+3

Stable Isotopes and Natural Abundance on Earth	¹⁵⁹Tb, 100%

Selected Radioisotopes	¹⁴⁹Tb

Atomic Radius	225 pm

Crystal Structure	Hexagonal

Discovered by	Mosander, 1843