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chlorine
Image: Wikimedia Commons

chlorine

Chemical element with symbol Cl and atomic number 17

Chemical elementchemical elementWHO essential medicineslithophile elementQ688

Also known as ₁₇Cl · bertholite · element 17

Symbol
Atomic number
  • 17
Mass
Melting point
  • 171.6 K
Boiling point
  • 238.5 K
Density
  • 2,086.5 kg/m³
Discovered by
Discovered
  • 1774

Overview

All data

126 statements · 17% with external sources · numbers in brackets are citations

IPA transcription
Oxidation state
  • -1
  • 1
  • 3
  • 5
  • 7
  • 2
  • 4
  • 6
Show 1 more
  • 0
Subclass of
Ionization energy
Electronegativity
  • 3
Has characteristic
Different from
Part of
Electron configuration
  • [Ne] 3s² 3p⁵
  • 1s² 2s² 2p⁶ 3s² 3p⁵
Named after
Ionic radius
  • 1.81 ångström coordination number: 6 · charge number: -1
  • 0.12 ångström charge number: 5 · coordination number: 3
  • 0.08 ångström charge number: 7 · coordination number: 4
Unicode character
Associated hazard
Space group
Crystal system
Thermal conductivity
  • 0.0089 watt per metre kelvin
Specific heat capacity
  • 480 joule per kilogram kelvin
Speed of sound
  • 206 m/s
Atomic radius
  • 100 picometre
Covalent radius
  • 102 picometre
Van der Waals radius
  • 175 picometre

On other databases

65 identifiers linking chlorine across the web's reference databases