Atomic Properties
- Atomic Number
- 95
- Atomic Mass
- 243.0000 u
- Electron Configuration
- [Rn] 5f7 7s2
- Electronegativity
- 1.13
- Block
- f-block
- Group
- —
- Period
- 7
Physical Properties
- Phase (STP)
- solid
- Melting Point
- 1449.00 K
- Boiling Point
- 2880.00 K
- Density
- 12.0000 g/cm³
About Americium
Used in smoke detectors; named after the Americas.
Isotopes of Americium
Americium has 0 naturally occurring isotopes, plus 2 notable radioactive isotopes.
| Isotope | Mass Number | Atomic Mass (u) | Abundance | Type |
|---|---|---|---|---|
| 241Am | 241 | 241.0568293 | — | Radioactive |
| 243Am | 243 | 243.0613813 | — | Radioactive |
Data source: NIH PubChem (aggregated from IUPAC, NIST)