हिन्दी में पढ़ेंHome › Elements › Terbium
Terbium (Tb)
Atomic number 65 · Lanthanide
| Atomic number | 65 |
|---|---|
| Atomic mass | 158.92535 u |
| Molar mass | 158.92535 g/mol |
| Category | Lanthanide |
| Group / period / block | — / 6 / f |
| Electron configuration | [Xe] 4f9 6s2 |
| Electrons per shell | 2, 8, 18, 27, 8, 2 |
| Atomic radius | 175.0 pm |
| Density | 8.23 g/cm³ |
| First ionisation energy | 5.8638 eV |
| Melting point | 1632.15 K (1359.00 °C) |
| Boiling point | 3503.15 K (3230.00 °C) |
| Common oxidation states | +3 |
| Abundance in Earth's crust | 1.2 ppm |
Uses
Green phosphors, sonar devices
Discovery
1843, Carl Mosander