| Property | Value |
|---|---|
| Atomic number | 101 |
| Atomic weight | 258.0986 amu |
| Element family | Actinoids |
| Electronic configuration | 1s2 |
| Stable and very long lived isotopes | None |
| Previous element | Fermium |
| Next element | Nobelium |
| Density | 10.3 g/cm3 (STP) |
| Melting | 827 °C |
| First ionization potential | 6.581 eV |
| Electron affinity | 0.980 eV |
| Electronegativity | 1.3 |
| Discovery year | 1955 |
Mendelevium is an element number 101 from actinoids family. Its symbol is Md. Mendelevium atomic weight is 258.0986 amu. Md has no stable or long lived isotopes. Mendelevium electronic configuration is 1s22s22p63s23p63d104s24p64d104f145s25p65d106s26p67s25f13. Mendelevium density is 10.3 g/cm3 (STP). Mendelevium melting point is 827 °C. Mendelevium first ionization potential is 6.581 eV. Mendelevium first ionization potential is 0.980 eV. Mendelevium electronegativity by Pauling scale is 1.3. Mendelevium was discovered in 1955.
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