| ChemGlobe: Einsteinium: Electronic data along with an isotope table and basic facts. |
| ChemicalElements.com: Einsteinium: Basic information, atomic structure, and table of isotopes. |
| Einsteinium: Data tables and historic information. |
| EnvironmentalChemistry.com: Einsteinium: Atomic structure, chemical and physical properties, and table of nuclides. |
| It's Elemental: Einsteinium: Basic physical and historical information. |
| LANL: Einsteinium: Basic information, history, and isotopes. |
| Lenntech: Einsteinium: Physical data and chemical properties. |
| Visual Elements: Einsteinium: Discovery, general and physical information, and ionisation energies. |
| WebElements: Einsteinium: Extensive information on history, compounds, and properties. |