Question

amongst the following pair state which one of the pair has larger size (a)Na and Na^+ (b) CL and Cl^- (c) Li and Na

Answer 1

Answer:

a) Na b) Cl^- c) Na

Explanation:

a) Between Na and Na^+ , Na has a larger size because in Na+, due to the loss of the electron, the effective nuclear charge is higher, i.e it can pull electrons more inside into a smaller orbit than the nucleus of Na

b) Cl already has 7 valence electrons, Cl- will have 8 electrons in its outer shell, this will cause repulsion forces between these electrons hence resulting in a larger size

c) Between Li and Na, Na has the larger size because as we go down the group, size increases