Answer :
Answer;
(4) Group 16
Explanation;
- Group 16 elements of the periodic table is called the oxygen family. They are also called Chalcogens since they are found as compounds or ores in the earth's crust.
- These elements like oxygen, they have six electrons in the outermost energy level, thus they have a valency of two as they require 2 electrons to attain a stable configuration. Examples of elements in this groups includes, oxygen, polonium, sulfur, and selenium.
- Therefore, due to the fact that element X has six outermost electrons then it belongs to group 16.