| Atomic Number: | 99 |
| Element Symbol: | Es |
| Element Name: | Einsteinium |
| Atomic Weight: | 252 |
| Group Name: | Actinoid |
| Period Number: | 7 (actinoid) |
| Block: | f-block |
| Ground State Configuration: | [Rn] 5f11 7s2 |
| Ground State Level: | 4Io15/2 |
| Standard State: | Artificially prepared |
| First Ionization Energy: | 619 |
| Pauling Electronegativity: | 1.3 |
| Allred Rochow Electronegativity: | 1.2 |
| Molar Volume: | 28.52 |
| Melting Point: | 860 |
| Most Common Oxidation Numbers: | 3 |
| Color: | Unknown, but probably metallic and silvery white or grey in appearance |
| Classification: | Metallic |
| Discovered By: | Workers at Argonne, Los Alamos, USA, and the University of California at Berkeley, USA. |
| Discovered At: | USA |
| Discovered When: | 1952 |
| Origin Of Name: | Named after Albert Einstein |
Calculate the molecular weight of Einsteinium or molecular weight Es.
Also see the full list of chemical elements and atomic weights.