95
Am
Americium
243.0614
2
8
18
32
25
8
2
8
18
32
25
8
2
| Property | Value |
|---|---|
| Atomic number | 95 |
| Atomic weight | 243.0614 amu |
| Element family | Actinoids |
| Electronic configuration | 1s2 |
| Stable and very long lived isotopes | None |
| Previous element | Plutonium |
| Next element | Curium |
| Density | 13.69 g/cm3 (STP) |
| Melting | 994 °C |
| Boiling | 2607 °C |
| Covalent radius | 1.66 Å |
| Ionic radius | 0.982 Å |
| Metallic radius | 1.73 Å |
| First ionization potential | 5.990 eV |
| Electron affinity | 0.100 eV |
| Electronegativity | 1.13 |
| Discovery year | 1944 |
Americium is an element number 95 from actinoids family. Its symbol is Am. Americium atomic weight is 243.0614 amu. Am has no stable or long lived isotopes. Americium electronic configuration is 1s22s22p63s23p63d104s24p64d104f145s25p65d106s26p67s25f7. Americium density is 13.69 g/cm3 (STP). Americium melting point is 994 °C. Americium boiling point is 2607 °C. Americium covalent radius is 1.66 Å. Americium ionic radius is 0.982 Å. Americium covalent radius is 1.73 Å. Americium first ionization potential is 5.990 eV. Americium first ionization potential is 0.100 eV. Americium electronegativity by Pauling scale is 1.13. Americium was discovered in 1944.
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