Einsteinium (Es)
A fascinating actinide element.
Einsteinium is element 99 on the periodic table.
Element properties
- Atomic number
- 99
- Symbol
- Es
- Atomic mass
- 252 u
- Category
- Actinide
- Period
- 7
- Group
- Not assigned
- Block
- f
- State
- Solid
- Electron configuration
- [Rn] 5f11 7s2
- Electronegativity (Pauling)
- 1.3
- Density
- 8.84 g/cm³
- Melting point
- 860 °C
- Boiling point
- 996 °C