17
Cl
35.45
Chlorine
Element 17 · 35.45 u · p-block
nonmetal
A yellow-green toxic gas with a pungent odor. Essential for water purification and production of PVC.
Phase (STP)
Gas
Melting Point
-101.5 °C
Boiling Point
-34.04 °C
Density
0.003214 g/cm³
Electronegativity
3.16
Atomic Radius
100 pm
Ionization Energy
1251 kJ/mol
Electron Affinity
349 kJ/mol
Discovered
1774 · Carl Wilhelm Scheele
Electron Configuration
[Ne] 3s2 3p5
Electron Orbitals
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