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- Aluminium has a density lower than that of other common metals, about one-third that of steel. It has a great affinity towards oxygen, forming a protective layer of oxide on the surface when exposed to air. Aluminium visually resembles silver, both in its color and in its great ability to reflect light. It is soft, nonmagnetic, and ductile.
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Physical properties; Phase at STP: solid: Melting point: 933.47 K (660.32 °C, 1220.58 °F) Boiling point: 2743 K (2470 °C, 4478 °F) Density (at 20° C) 2.699 g/cm 3: when liquid (at m.p.) 2.375 g/cm 3 : Heat of fusion: 10.71 kJ/mol : Heat of vaporization: 284 kJ/mol : Molar heat capacity: 24.20 J/(mol·K) Vapor pressure
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The official recognized spelling is aluminum and should be...
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Aluminum food can with an easy-open, full pull-out end. An...
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A roll of aluminium foil. Aluminium foil (or aluminum foil...
- Post-Transition Metal
Silver is a soft metal (MH 2.5–3) with low mechanical...
- Aluminium Alloys
Welded aluminium alloy bicycle frame, made in the 1990s. An...
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- History
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- Occurrence and Preparation
- Compounds
- Uses
- Recycling
- Toxicity
- Ways of Exposure
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- Environmental Effects
People have tried to produce aluminium since 1760. The first successful attempt, finished in 1824 by Danish physicist and chemist Hans Christian Ørsted. He reacted anhydrous aluminium chloride with potassium amalgam, yielding a lump of metal looking similar to tin. He presented his results and showed a sample of the new metal in 1825. In 1827, Germ...
Aluminium is a very good conductor of electricity and heat. It is light and strong. It can be hammered into sheets (malleable) or pulled out into wires (ductile). It is a highly reactive metal, although it is corrosionresistant. A fresh film of aluminium is a good reflector of visible light and an excellent reflector of medium and far infrared radi...
Pure aluminium is made from bauxite, a kind of rock that has aluminium oxide and many impurities. The bauxite is crushed and reacted with sodium hydroxide. The aluminium oxide dissolves. Then the aluminium oxide is dissolved in liquid cryolite. Natural cryolite is a rare mineral, so most is produced artificially. The aluminium oxide is electrolyzed...
aluminium forms chemical compounds in the +3 oxidation state. They are generally unreactive. aluminium chloride and aluminium oxideexamples. Very rarely are compounds in the +1 or +2 oxidation state.
Many things are made of aluminium. Much of it is used in overhead power lines. It is also widely used in window frames and aircraft bodies. It is found at home as kitchenware, soft drink cans, and cooking foil. aluminium is also used to coat car headlamps and compact discs. It is used in electrical transmission lines because of its light weight. It...
Since aluminium needs to be made by electrolysis, it requires a very large amount of electrical power. Recycling aluminium would be much cheaper. That's why recycling plants were opened. The cost of recycling aluminium is much less than the cost of making it from bauxite. Recycling involves melting the scrap. This is a process that only needs 5% of...
aluminium is not used in the human body, although it is very common. People debate whether its use in deodorants and water treatment is healthy. aluminium ions slow down plant growth in acidic soils. aluminium may be a factor in Alzheimer's disease (a disease when the brain stops working and the patient is confused). But the Alzheimer's Societysays...
Food is the main source of aluminium. Drinking water has more aluminium than solid foods. aluminum in food may be absorbed more than aluminum from water. Major sources of human exposure by mouth to aluminum include food (because of its use in food additives, food and beverage packaging, and cooking utensils), drinking water (because of its use in w...
In case of suspected sudden consumption of a large amount of aluminium, the only treatment is deferoxamine mesylate. It may be given to help remove aluminium from the body by chelation. This should be applied with caution as it not only remove aluminium in the body, but also other metals such as copper or iron.
High levels of aluminium occur near mining sites. Small amounts of aluminium are released to the environment at the coal-fired power plants or incinerators. aluminium in the air is washed out by the rain or normally settles down. But, small particles of aluminium remain in the air for a long time. Acid rain is the main natural factor to move alumin...
- aluminum (U.S., Canada)
- silvery gray metallic
Apr 19, 2024 · Aluminum is an excellent conductor of heat and electricity. Its thermal conductivity is about one-half that of copper; its electrical conductivity, about two-thirds. It crystallizes in the face-centred cubic structure. All natural aluminum is the stable isotope aluminum-27. Metallic aluminum and its oxide and hydroxide are nontoxic.
- The Editors of Encyclopaedia Britannica
Wöhler continued his research and in 1845 was able to produce small pieces of the metal and described some of its physical properties. Wöhler's description of the properties indicates that he had obtained impure aluminium. [40]
Aluminium visually resembles silver, both in its color and in its great ability to reflect light. It is soft, nonmagnetic, and ductile. It has one stable isotope, 27Al, which is highly abundant, making aluminium the twelfth-most common element in the universe.
Element Aluminium (Al), Group 13, Atomic Number 13, p-block, Mass 26.982. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.
Since it has few available electrons for metallic bonding, like its heavier group 13 congeners, it has the characteristic physical properties of a post-transition metal, with longer-than-expected interatomic distances.
