Final answer:
The element X in question belongs to the 3rd period and group 2 of the periodic table, making it a metal.
Step-by-step explanation:
In the periodic table, elements are classified as metals, nonmetals, or metalloids. An element X that belongs to the 3rd period and group 2 would be classified as a metal. Group 2 elements are known as alkaline earth metals, which are located in the second column of the periodic table. Examples of alkaline earth metals include beryllium, magnesium, and calcium.