| Property | Value |
|---|---|
| Atomic number | 24 |
| Atomic weight | 51.99616 amu |
| Element family | Transition metals |
| Electronic configuration | 1s2 |
| Stable and very long lived isotopes | 52Cr: 83.79%, 53Cr: 9.50%, 54Cr: 2.36% |
| Previous element | Vanadium |
| Next element | Manganese |
| Density | 7.15 g/cm3 (STP) |
| Melting | 1857 °C |
| Boiling | 2482 °C |
| Covalent radius | 1.22 Å |
| Ionic radius | 0.52 Å |
| Metallic radius | 1.28 Å |
| First ionization potential | 6.767 eV |
| Electron affinity | 0.676 eV |
| Electronegativity | 1.66 |
| Discovery year | 1794 |
Chromium is an element number 24 from transition metals family. Its symbol is Cr. Chromium atomic weight is 51.99616 amu. Cr stable and long lived isotopes are 52Cr: 83.79%, 53Cr: 9.50%, 54Cr: 2.36%. Chromium electronic configuration is 1s22s22p63s23p64s13d5. Sample compounds that contain Chromium are K2Cr2O7, K2CrO4, Cr2O3, (NH4)2Cr2O7, Ag2CrO4, Na2CrO4.
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