| Element | Americium | Symbol | Am |
| Atomic Number | 95 | Molar Mass | 241.06 g mol-1 |
| Electron Configuration | [Rn]5f77s2 | Normal State | solid metal |
| Density @STP | 13.67 g cm-3 | Melting Point | 1176oC |
| Boiling Point | 2011oC | Stable Isotopes | none |
| Atomic Radius | 184 pm | Ionic Radius | 107 (3+) pm |
| Electronegativity (Pauling) | 1.3 | Ionization Energy (1st) | 578 kJ mol-1 |
| Ionization Energy (2nd) | 1158 kJ mol-1 | Ionization Energy (3rd) | 2161 kJ mol-1 |
| Molar Heat Capacity | J K-1mol-1 | Standard Molar Entropy | J K-1mol-1 |
| Enthalpy of Fusion | kJ mol-1 | Enthalpy of Vapourization | kJ mol-1 |