Discovered By: Carl Wilhelm Scheele
Discovery year: 1774

The following table showing some properties of Chlorine(Cl):

Table Example
Atomic number 17
Group 17
Period 3
Block p
Electrons 17
Protons 17
Neutrons 18
atomic weight 35.45
Oxidation states -1, +1, +3, +5, +7
Ionic charge Cl^-


Table Example
Electrons per shell K2 L8 M7
Electron configuration 1s^2 2s^2 2p^6 3s^2 3p^5
Gas atomic multiplicities 2
Atomic radius 79 pm
Covalent radius 102 pm
Van der Waals radius 175 pm
Boiling point -34.04°C
Melting point -101.5°C
Phase Gas
Fusion heat 3.2 kJ.mol^-1


Table Example
Color Yellow
Bulk modulus 1.1 GPa
Density 3.214 kg.m^-3
Refractive index 1.000773
Sound speed 206 m.s^-1
Thermal conductivity 0.0089 W.m^-1.K^-1
Electrical conductivity 1.10^-2 S.m^-1
Electric type Insulator
Magnetic type Diamagnetic
Resistivity 1*10^2 Ohm.m


Table Example
Electronegativity 3.16
valence 1
Electron affinity 349 kJ.mol^-1
First ionization energy 1251.2 kJ.mol^-1
Radioactive no
Neutron cross section 35.3 barn
Specific heat 478.2 J.kg^-1.K^-1
Vaporization heat 10.2 kJ.mol^-1
Volume magnetic susceptibility -2.31*10^8
Mass magnetic susceptibility -7.2*10^-9 m^3.kg^-1