Chlorine (Cl)

Symbol Cl
Atomic Number 17
Atomic Weight 35.453
Group 17 (fluorine family)
VIIB (Old IUPAC), VIIA (CAS)
Period 3
Block p

Planetary Bohr Model of Cl
Lewis Dot Diagram of Cl

Physical Properties

Density 0.00321 g/cm3
Atomic Volume 18.7 cm3/mole
Atomic Radius 0.97 angstroms
Covalent Radius 99 pm
Radioactive No

States

Melting Point -101.0 °C
Boiling Point -34.6 °C
Heat Of Fusion 3.21 kJ/mole
Heat Of Vaporization 10.2 kJ/mole

Energy

Electronegativity 3.2 (Pauling Scale)
Electron Affinity -349 kJ/mol
1st Ionization Energy 1255 kJ/mol
Specific Heat Capacity 0.48 J g−1 K−1
Thermal Conductivity 0.0089 W·m−1·K−1

Electrons and Oxidation

Oxidation States -1
Electrons Per Shell 2 8 7
Electron Configuration [Ne] 3s2 3p5
1s2 2s2 2p6 3s2 3p5

Translations

English Chlorine
Deutsch Chlor
Lëtzebuergesch Chlor
Nederlands Chloor
Afrikaans Chloor
Frysk Gloar
Dansk Chlor or Klor
Svenska Klor
Norsk Klor
Íslenska Klr
Føroysk Klor
Latin Chlorium
Français Chlore
Español Cloro
Catalana Clor
Occitana Clr
Português Cloro
Galego Cloro
Italiano Cloro
Furlan Clr
Român Clor
Moldavian Clor
Armãneashte Cloru
Русский ????
Українска ????
Byelorussian ????
Polska Chlor
Kaszëbsczi Chlor
Čech Chlor
Slovenský Chlr
Slovenščina Klor
Hrvatska Klor
Српски ????
Bosnian Hlor
Македонски ????
Български ????
Lietuviškai Chloras
Lao Hlors
Sudovian Chl?ras
Cymraeg Clorin
Gaeilge na hÉireann Clirn
Gàidhlig na h Clirin
Gaelg Vanninagh Cloreen
Cornish Cloryn
Brezhoneg Klor
Ελληνική ??????
Shqip Klor
Ossetian ????
Euskera Kloroa
Georgian ?????
Suomi Kloori
Eesti Kloor
Magyar Klr
Türkçe Klor
Kazakh ????
Uzbek ????
Tajik Hlor
Mongolian ????
日本語 ?? [enso]
中国话 ?
ไทย ??????
Vietnamese Clo
Bahasa Melayu Klorin, Klor
العربيه ????
Il-Malti Klorin
עברית ????
Esperanto Kloro

History

Discovered In
1774
Discovered By
Carl William Scheele
Discovered At
Sweden
Word Origin
From the Greek word "chloros" meaning "pale green"