Write any three physical properties of the given metals.

a.    Iron:
    > It is good conductor of heat.
    > Its specific gravity is 7.86.
    > It is malleable and ductile.
b.    Aluminium:
    > It is good conductor of heat and electricity.
    > its specific gravity is 2.7.
    > It is highly malleable and ductile.
c.    Copper:
    > It is good conductor of heat and electricity.
    > its specific gravity is 8.95.
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