If 175 g of Mg reacts completely, how many moles of P would be needed according to the balanced equation below?
3 Mg + 2 P > Mg3P2

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.