Einsteinium
Einsteinium is a metallic synthetic element. On the periodic table, it is represented by the symbol Es and atomic number 99. It is the seventh transuranic element, and seventh in the series of Actinides.
| General | |
|---|---|
| Name, Symbol, Number | einsteinium, Es, 99 |
| Chemical series | actinides |
| Group, Period, Block | n/a, 7, f |
| Appearance | silver-coloured |
| Standard atomic weight | (252) g·mol-1 |
| Electrons per shell | 2, 8, 18, 32, 29, 8, 2 |
| Physical properties | |
| Phase | solid |
| Density (near r.t.) | 8.84 g·cm−3 |
| Melting point | 1133K (860°C, 1580°F) |
| Atomic properties | |
| Oxidation states | 2, 3, 4 |
| Electronegativity | 1.3 (Pauling scale) |
| Ionization energies | 1st: 619 kJ/mol |
| Miscellaneous | |
| Magnetic ordering | no data |
| CAS registry number | 7429-92-7 |
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