Periodic table of the elements
SulfurChlorineArgon
17
Cl
Chlorine
35.453
2
8
7
17
Cl
Chlorine
35.453
2
8
7
General
NameChlorine
SymbolCl
Number17
Chemical seriesHalogens
Group / Period17 / 3
Blockp-block
CAS registry number7782-50-5

Physical properties
Stategas
Density3.2 g/L
Melting point171.6 K (-101.5 °C, -150.7 °F)
Boiling point239.11 K (-34.04°C, -29.27°F)
Critical point416.9 K, 7.991 MPa

Atomic properties
Atomic Weight35.453 g/mol
Crystal structureorthorhombic
Electronegativity3.16
Atomic radius100 pm
Atomic radius (calculated)79 pm
Electron configuration[Ne] 3s2 3p5
Electrons per shell2, 8, 7
Number of protons17
Number of neutrons18

Other languages
SpanishCloro
PortugueseCloro
FrenchChlore
GermanChlor
ItalianCloro
RussianХлор
PolishChlor
Chinese
Arabicكلور
TurkishKlor
DutchChloor


Periodic table of the elements
SulfurChlorineArgon