Skip to content
aidb
aluminium
Image: Wikimedia Commons

aluminium

Metallic chemical element of silvery appearance with symbol Al and atomic number 13

Chemical elementchemical elementlithophile elementQ663

Also known as aluminum · element 13 · 13Al

Symbol
Atomic number
  • 13
Mass
Melting point
Boiling point
Density
Discovered by
Discovered
  • 1825

Overview

All data

262 statements · 33% with external sources · numbers in brackets are citations

IPA transcription
  • ˌæljəˈmɪniəm language: English · applies to name of subject: aluminium
  • əˈluːmənəm language: English · applies to name of subject: aluminum
Oxidation state
  • 3
  • 1
  • 2
  • -2
  • -1
  • 0
Named after
Subclass of
Electronegativity
  • 1.61
NIOSH Pocket Guide ID
  • 7900
Has effect
Canonical SMILES
Vapor pressure
Time-weighted average exposure limit
Show 2 more
Made from material
Thermal conductivity
  • 236 watt per metre kelvin state of matter: solid
Permanent duplicated item
Recycling code
  • 41
Electrical conductivity
Unicode character
Part of
Safety classification and labelling
Electron configuration
  • [Ne] 3s² 3p¹
  • 1s² 2s² 2p⁶ 3s² 3p¹
Has use
Ionic radius
  • 0.39 ångström coordination number: 4 · charge number: 3
  • 0.48 ångström coordination number: 5 · charge number: 3
  • 0.54 ångström coordination number: 6 · charge number: 3
Found in taxon
Model item
Different from
Associated hazard
Production rate
Show 17 more
2022 Harmonized System Code
Space group
Crystal system
Bulk modulus
  • 76.9B Pa
Specific heat capacity
  • 897 joule per kilogram kelvin
Electrical resistivity
  • 2.65e-8 ohm metre
Point group
Standard enthalpy of formation
  • 330 kilojoule per mole state of matter: gas
  • 10.56 kilojoule per mole state of matter: liquid
Standard molar entropy
  • 164.554 joule per mole kelvin state of matter: gas
  • 39.55 joule per mole kelvin state of matter: liquid
  • 28.3 joule per mole kelvin state of matter: solid
Mohs' hardness
  • 2.75
Has characteristic
Linear thermal expansion coefficient
  • 22.87 micrometre per metre kelvin temperature: 20°C
Ionization energy
Atomic radius
  • 125 picometre
Show 1 more properties
Covalent radius
  • 121 picometre

On other databases

125 identifiers linking aluminium across the web's reference databases