Es
Einsteinium Symbol (Es)
Einsteinium is element 99 of the periodic table. Copy its symbol Es and see its atomic weight, electron configuration and physical properties.
What does Es mean?
Es is the chemical symbol for einsteinium, element number 99 in the periodic table. Einsteinium is an actinide in the f-block, period 7. It is a solid at room temperature and was discovered in 1952.
Codes and properties
| Chemical symbol | Es |
|---|---|
| Atomic number (Z) | 99 |
| Mass number (no standard atomic weight) | [252] |
| Group / period | f-block / 7 |
| Element category | actinide |
| Electron configuration | [Rn]7s² 5f¹¹ |
| State at 20 °C | Solid |
| Oxidation states | +3 |
| Electronegativity (Pauling) | 1.3 |
| Melting point | 1133 K (859.85 °C) |
| Discovered | 1952 |
How to type Es
- Plain text: type
Es— element symbols are ordinary Latin letters, with the first letter capitalised and the second lowercase. - Subscripts in formulas: use Unicode subscript digits (₀₁₂₃₄₅₆₇₈₉) for formulas such as H₂O — copy them from the chemistry keyboard.
- LaTeX: write
\mathrm{Es}in math mode, or use the mhchem package:\ce{Es}. - HTML:
Es; for subscripts use<sub>, e.g.H<sub>2</sub>O.
Frequently asked questions
What is the chemical symbol for einsteinium?
The chemical symbol for einsteinium is Es.
What is the atomic number of einsteinium?
Einsteinium has atomic number 99, meaning each atom has 99 protons.
What is the electron configuration of einsteinium?
The ground-state electron configuration of einsteinium is [Rn]7s² 5f¹¹.
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Reference: Einsteinium on PubChem (NIH)