(i) Identify elements X and Y. (ii) Do these elements belong to the same group? Explain.

Question

Observe the following diagram and answer the following questions:

(i) Identify elements X and Y.

(ii) Do these elements belong to the same group? Explain.

(iii) which element is more electropositive in nature? Why?

Answer 1

(i) An element X is Sodium (Na).

An element Y is Lithium (Li).

(ii) Yes, these elements belong to the same group as they have the same number of valence electrons.

(iii) Element X is more electropositive than Y. This is because while going down the group, electropositivity increases with increase in atomic size.