| Element (Atom) Name | Einsteinium |
| Symbol | Es |
| Physical state at room temperature | Solid |
| Element Classification | Metal |
| Group Name | Actinide |
| Period Number (Periodic table) | 7 |
| Group number (Periodic table) | None |
| Atomic number | 99 |
| Atomic weight | 252 (Ref: Jlab-ele099) |
| Atomic Radius | 245 pm (Van der Waals) (Ref: Lanl-99) |
| Density | ? |
| Melting point | 860°C (Ref: Jlab-ele099) |
| Boiling point | 996 °C (Ref: Lanl-99) |
| Electron shell configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f11 6s2 6p6 7s2 |
| Oxidation States | +3 (Ref: Jlab-ele099) 2, 3, 4 (Ref: Lanl-99) |
| Ionization Energy | 6.42 eV (Ref: Jlab-ele099) 6.36758 eV (Ref: Nist-99) |
| Number of Stable Isotopes | 0 |
| InChI | InChI=1S/Es (Ref: Pubchem-99) |
| InChI Key | CKBRQZNRCSJHFT-UHFFFAOYSA-N (Ref: Pubchem-99) |
| Remarks | Radioactive, Artificially Produced (Ref: Jlab-ele099) |
REFERENCES
- Jlab-ele099: https://education.jlab.org/itselemental/ele099.html
- Lanl-99: https://periodic.lanl.gov/99.shtml
- ciaaw-atomic-weights: https://www.ciaaw.org/atomic-weights.htm
- Nist-99: https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=99
- Pubchem-99: https://pubchem.ncbi.nlm.nih.gov/element/99
- science.co.il: https://www.science.co.il/elements/
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