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Aluminium (Al)

Aluminium (Al) is element 13 of the periodic table, a post-transition metal in period 3 and group 13. Its standard atomic weight is 26.9815384, so one mole of aluminium atoms has a mass of 26.9815384 g. At room temperature it is a solid; it melts at 660.29 °C and boils at 2518.85 °C.

13 Al Aluminium 26.9815384

Period 3, group 13 · Post-transition metal

← Mg Magnesium Si Silicon →

Atomic number	13
Symbol	Al
Standard atomic weight	26.9815384
Molar mass	26.9815384 g/mol
Category	Post-transition metal
Group	13
Period	3
Block	p-block
Electron configuration	[Ne] 3s² 3p¹
Oxidation states	+3
Electronegativity (Pauling)	1.61
Atomic radius (van der Waals)	184 pm
First ionisation energy	5.986 eV (577.6 kJ/mol)
Electron affinity	0.441 eV
State at room temperature	Solid
Melting point	933.44 K (660.29 °C)
Boiling point	2792 K (2518.85 °C)
Density	2.7 g/cm³
Discovered	Known since antiquity

Group 13

B · Boron Ga · Gallium In · Indium Tl · Thallium Nh · Nihonium

Calculate with Aluminium

Molar mass of Al Balance an equation Grams, moles and particles Whole periodic table

Atomic weight: IUPAC CIAAW standard atomic weight. Other properties: PubChem (U.S. National Library of Medicine, public domain). Values such as melting point and radius depend on how they were measured; check a data book for precise work.