- Atomic Radius (Å)
Chlorine is a chemical element with symbol Cl and atomic number 17. It also has a relative atomic mass of 35.5. Chlorine is in the halogen group (17) and is the second lightest halogen following fluorine.
17
Atomic Number
35.45 u
Atomic Mass
172.31 K
Melting Point
239.11 K
Boiling Point
3.20e-3 g/cm³
Density
0.97 Å
Atomic Radius
1.02 Å
Covalent Radius
3.16
Electronegativity
12.97 eV
First Ionization Energy
348.57
Electron Affinity
3
Number of Shells
7
Electron Valency
2, 8, 7
Electron Shell Occupations
0.48 J/g
Specific Heat