What are the basic properties of Einsteinium?
Einsteinium (symbol: Es) is a actinide with atomic number 99. Its atomic mass is 252.0 u, and it belongs to period 7 and group 3.
Einsteinium (Es) Properties and Facts
Element 99 - Actinide
What is the electron configuration of Einsteinium?
The electron configuration is: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 6s²
What are the physical properties of Einsteinium?
Melting point: 1133.0 K
Boiling point: 1269.0 K
Density: 8.84 g/cm³
What are the known isotopes of Einsteinium?
- Es-252: Half-life of 471.7 days
- Es-253: Half-life of 20.47 days
- Es-254: Half-life of 275.7 days
- Es-255: Half-life of 39.8 days
- Es-256: Half-life of 25.3 days
What is the biological role and occurrence of Einsteinium?
Biological role: Highly radioactive and toxic
Natural occurrence: Synthetic element