Tb
Terbium Symbol (Tb)
Terbium is element 65 of the periodic table. Copy its symbol Tb and see its atomic weight, electron configuration and physical properties.
What does Tb mean?
Tb is the chemical symbol for terbium, element number 65 in the periodic table. Terbium is a lanthanide in the f-block, period 6. It is a solid at room temperature and was discovered in 1843.
Codes and properties
| Chemical symbol | Tb |
|---|---|
| Atomic number (Z) | 65 |
| Atomic weight (PubChem) | 158.92535 |
| Group / period | f-block / 6 |
| Element category | lanthanide |
| Electron configuration | [Xe]6s² 4f⁹ |
| State at 20 °C | Solid |
| Oxidation states | +3 |
| Melting point | 1629 K (1355.85 °C) |
| Boiling point | 3503 K (3229.85 °C) |
| Density | 8.23 g/cm³ |
| Discovered | 1843 |
How to type Tb
- Plain text: type
Tb— element symbols are ordinary Latin letters, with the first letter capitalised and the second lowercase. - Subscripts in formulas: use Unicode subscript digits (₀₁₂₃₄₅₆₇₈₉) for formulas such as H₂O — copy them from the chemistry keyboard.
- LaTeX: write
\mathrm{Tb}in math mode, or use the mhchem package:\ce{Tb}. - HTML:
Tb; for subscripts use<sub>, e.g.H<sub>2</sub>O.
Frequently asked questions
What is the chemical symbol for terbium?
The chemical symbol for terbium is Tb.
What is the atomic number of terbium?
Terbium has atomic number 65, meaning each atom has 65 protons.
What is the electron configuration of terbium?
The ground-state electron configuration of terbium is [Xe]6s² 4f⁹.
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Reference: Terbium on PubChem (NIH)