chlorine

| Introduction | History | Other Periodic Tables | Back |

Symbol:

Cl

Atomic Number:

17

Relative Atomic Mass:

35.4527 g mol^-1

Natural Abundance in Lithosphere, hydrosphere and atmosphere:

0.19% (mass fraction)

Electron Configuration:

[Ne]3s²3p⁵

Oxidation States:

VII, V, III, I, -I

Atomic Radius:

99.4pm

Covalent Radius:

99pm

Ionic Radius:

181pm (for -1 oxidation state)

Van der Waals Radius:

180pm

Boiling Point:

-34.6°C

Density:

2.95 g L^-1 (at 1013mbar)

First Ionisation Energy:

12.967 eV

Reduction Potential:

1.358V

for Cl + e^- a Cl^1-

Electronegativity (Allred and Rochow):

2.8

Number of Natural Isotopes:

2

Mass Number of the Most Abundant Isotopes:

35 g mol^-1 a 75.8% abundance

37 g mol^-1 a 24.2% abundance