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| Atomic Number | 99 |
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| Atomic Symbol | Es |
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| Atomic Weight | [252 amu] |
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| Group | Rare Earth (Actinide Series) |
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| Form | Solid |
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| Melting Point | 860 °C (1580 °F, 1133.15 °K) |
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| First Ionization Potential | 6.42 eV |
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| Ground State Electron Configuration | 5f11 6s2 6p6 6f2 |
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| Oxidation States | +3 |
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| Selected Radioisotopes | 253Es |
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| Discovered by | Ghiorso and others, 1952 |
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