65Tb158.93
Terbium
Lanthanide · element 65 · f-block (shown below the main table)
Quick facts
| Symbol | Tb |
|---|---|
| Atomic number | 65 |
| Relative atomic mass | 158.93 |
| Category | Lanthanide |
| Position | f-block (shown below the main table) |
| State at 20 °C | Solid |
| Melting point | 1,356 °C |
| Boiling point | 3,230 °C |
| Density | 8.23 g/cm³ |
| Electronegativity | 1.1 |
| Electron configuration | [Xe] 4f9 6s2 |
About Terbium
Terbium has the symbol Tb and atomic number 65, which means every terbium atom has 65 protons in its nucleus and, in a neutral atom, 65 electrons. At room temperature it is a solid.
Lanthanides are the first row of the f-block. Many are used in strong magnets, screens and lasers.
It melts at 1,356 °C and boils at 3,230 °C.
Explore it
See where terbium sits, and drag the temperature slider to watch it melt and boil, on the interactive periodic table. Practise with quizzes on OmniEx.