| Property | Value |
|---|---|
| Atomic number | 17 |
| Atomic weight | 35.4532 amu |
| Element family | Non-metals |
| Electronic configuration | 1s2 |
| Stable and very long lived isotopes | 35Cl: 75.77%, 37Cl: 24.23% |
| Previous element | Sulfur |
| Next element | Argon |
| Density | 0.003214 g/cm3 (STP) |
| Melting | -100.84 °C |
| Boiling | -101 °C |
| Covalent radius | 0.99 Å |
| Van der Waals radius | 1.75 Å |
| Ionic radius | 1.81 Å |
| First ionization potential | 12.967 eV |
| Electron affinity | 3.613 eV |
| Electronegativity | 3.16 |
| Discovery year | 1774 |
Chlorine is an element number 17 from non-metals family. Its symbol is Cl. Chlorine atomic weight is 35.4532 amu. Cl stable and long lived isotopes are 35Cl: 75.77%, 37Cl: 24.23%. Chlorine electronic configuration is 1s22s22p63s23p5. Sample compounds that contain Chlorine are NaCl, HCl, KCl, CaCl2, Cl2, MgCl2.
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