Chlorine

Atomic number17
Atomic weight35.4527
Discovery (year)1774
Atomic radius (A)1.01
Melting point (oC)-101
Boiling point (oC)-34.11
Density (g/cm3)3.21
Specific heat (cal/g oC)0.116
Ionization potential (eV)12.967
Electron Affinity (eV)3.615