An element X belongs to the 3^rd period and group 2 of the periodic table. State:
(a) number of valence electrons
(b) valency
(c) metal or non-metal
(d) name of the element

(a) The element X has 2 valence electrons as it belongs to group 2.

(b) As the number of valence electrons and the valency of group 2 elements is 2, hence, the valency of element X is 2.

(d) The name of the element is Magnesium (Mg) since X belongs to group 2 and the 3rd period.