Chemical Facts

 

Name:

Aluminium

Symbol:

Al

Atomic number:

13

Group in periodic table

13

Group name:

(none)

Period in periodic table:

3

Block in periodic table:

p-block

Electron shell structure:

2.8.3

Relative atomic mass (Ar):

26.9815386 (8)

Standard state:

solid at 298 K

Average mass:

26.982 Da

Color:

silvery

Density of solid:

2700 kg m‑3

Phase at Room Temperature:

Solid

Melting Point:

1,220.58 degrees F  (660.32 degrees C)

Boiling Point:

4,566 degrees F (2,519 degrees C)

Mono-isotopic mass:

26.981539 Da

Number of isotopes (atoms of the same element with a different number of neutrons):

22, one stable

Most common isotopes:

Al-27 (stable) and Al-26 (radioactive; half-life 730,000 years)

Molar volume:

10.00 cm3

Young's modulus:

70 GPa

Rigidity modulus:

26 GPa

Bulk modulus:

76 GPa

Poisson's ratio:

0.35 (no units)

Mineral hardness:

2.75 (no units)

Brinell hardness:

245 MN m-2

Vickers hardness:

167 MN m-2

Discoveror:

Hans Christian Oersted

Place of discovery:

Denmark

Date of discovery:

1825

Origin of Name:

from the Latin word "alumen" meaning "alum".

CAS Registry ID:

7429-90-5

ChemSpider:

ID: 4514248

 

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