Which metal is available in the highest proportion on the earth's crust?

Explain the following.
$(a)$ Why are copper and aluminium wires usually employed for electricity transmission?

Give an example of a metal which is the best conductor of heat.

Give reasons for the following:
$(a)$ School bells are made of metals.
$(b)$ Electrical wires are made of copper.

Name the following:
$(a)$ $A$ metal which is preserved in kerosene.
$(b)$ $A$ lustrous coloured non-metal.
$(c)$ $A$ metal which can melt while kept on palm.
$(d)$ $A$ metal which is a poor conductor of heat.

Identify and name the metals from the following elements whose electronic configurations are given below:
$(a)$ $2, 8, 2$
$(b)$ $2, 8, 1$
$(c)$ $2, 8, 7$
$(d)$ $2, 1$