Which of the following properties is generally not shown by metals?

Which metal reacts with cold water violently?

State three reasons for the following fact: $(a)$ Magnesium is a metal. One of the reasons must be supported with a chemical equation.

Which alloy is used to make surgical instruments?

$(a)$ Consider the following chemical equation:
$Fe_{2}O_{3} + 2Al \rightarrow Al_{2}O_{3} + 2Fe$
Name two categories in which you can place this reaction.
$(b)$ Define the term 'Oxidation' of a substance and name the substance oxidised and the oxidising agent in the above reaction.

Give a reason why electrical wires are coated with plastic.