हिन्दी में पढ़ेंHome › Elements › Americium
Americium (Am)
Atomic number 95 · Actinide
| Atomic number | 95 |
|---|---|
| Atomic mass | 243.0 u |
| Molar mass | 243.0 g/mol |
| Category | Actinide |
| Group / period / block | — / 7 / f |
| Electron configuration | [Rn] 5f7 7s2 |
| Electrons per shell | 2, 8, 18, 32, 25, 8, 2 |
| Atomic radius | 175.0 pm |
| Density | 12.0 g/cm³ |
| First ionisation energy | 5.9738 eV |
| Melting point | 1449.15 K (1176.00 °C) |
| Common oxidation states | +3 |
Uses
Household smoke detectors
Discovery
1945, G.T.Seaborg, R.A.James, L.O.Morgan, A.Ghiorso