Aluminum is made up of aluminum atoms.
An aeroplane body is made up of an alloy (meaning: mixture of metals) of aluminium and copper. This is as aluminium is very light and cheap, but it needs copper as aluminium is too brittle. This way the plane have a weight of aluminium but the felexibility of copper!
Aluminium nitrate - Al(NO3)2 - is a molecule and this compound contain molecules.
Aluminium is a metal (an element), not an alloy. This means that it's only made up of aluminium atoms. It has no other impurities in it. Aluminium ore is called bauxite. This has aluminium plus other substances in it, but aluminium on its own is a metal with just aluminium atoms in it.
It may be made up of aluminium. But in A380, due to its heaviness it is made up of a combination of fibreglass and another material.
They are tools made of aluminium
An ammonal is an explosive made up of ammonium nitrate, TNT, and aluminium powder.
ALN (aluminium nitride) is a covalent compound. It is made up of aluminium and nitrogen atoms that share electrons to form covalent bonds.
The body of an aeroplane is made up of aluminium because aluminium is light and durable. An aeropane needs to be light to obtain lift, and durable to withstand the stresses of flight. However, the body is not pure aluminium, but an alloy, or mixture of metals, as this increases the strength of the aluminium through reinforcement. Early aircraft alloys are were made of aluminium, copper (1.3%), magnesium (2.8%) and manganese (1%), a combination invented back in 1909. This has formed the basis for the development of modern aircraft alloys. There are now different combinations of aluminium alloys for different purposes. See the related weblink below for more details.
its made out of aluminium
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Corundum is a crystalline form. This crystalline form is made up of aluminium oxide.
Most aircraft wheels are made of aluminium alloys. They are light and strong.