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- Name : Aluminum
- Symbol : Al
- Atomic # : 13
- Atom weight: 26.9815
- Melting P. : 660.37
- Boiling P. : 2467
- Oxidation : +3
- Pronounced : ah-LOO-men-em, al-yoo-MIN-i-em
- From : Latin alumem, aluminis "alum"
- Identified : Antoine Lavoisier in 1787
- Appearance : Soft, lightweight, silvery-white metal
- Note : Most abundant metal on the surface of earth
-
- [Properties]
-
- In its purest form, aluminum is a bluish-white metal which is highly
- malleable and ductile. It is commercially notable as a lightweight
- construction material and as a good conductor of heat and electricity. Pure
- aluminum is, in fact, too soft for construction applications; however,
- adding small amounts of silicon and iron (less than 1%) hardens and
- strengthens it.
- It is said than aluminum resists oxidation. This is quite true, but only
- in the sense that the metal is actually protected by a thin film of
- corrosion-resistant aluminum oxide that forms the moment the pure metal is
- cut. Without its ever-present oxide coating, aluminum would be quickly
- destroyed by atmospheric gasses and moisture. Even the protective oxide
- coating cannot protect aluminum metal forever, thus accounting for the
- fact that the metal does not exist in nature in its elemental state.
- Aluminum belongs to the boron group, Group IIIA, on the periodic table.
- Like its companions in this group - boron, gallium and indium for example -
- aluminum's principal oxidation state is +3.
-