हिन्दी में पढ़ेंHome › Elements › Mendelevium
Mendelevium (Md)
Atomic number 101 · Actinide
| Atomic number | 101 |
|---|---|
| Atomic mass | 258.0 u |
| Molar mass | 258.0 g/mol |
| Category | Actinide |
| Group / period / block | — / 7 / f |
| Electron configuration | [Rn] 5f13 7s2 |
| Electrons per shell | 2, 8, 18, 32, 31, 8, 2 |
| Density | 10.3 g/cm³ |
| First ionisation energy | 6.58 eV |
| Melting point | 1100.15 K (827.00 °C) |
| Common oxidation states | +3 |
Uses
Research only — synthetic, made a few atoms at a time
Discovery
1955, G.T.Seaborg, S.G.Tompson, A.Ghiorso, K.Street Jr