Iron is A transition metal and malleable.
A transition metal and wont conduct electricity.
An alkali Metal that conducts electricity.
An Alkaline earth metal.

the product of the pressure and volume is also constant

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.