Question

select the smaller ion from each of the following pair (1) K+,Li+. (2) N3- ,F-​

Answer 1

Answer:

(1) Li+ is the smaller ion due to its small atomic radius compared to that of K+.

(2) F- is the smaller ion because fluorine has 9 protons while nitrogen has 7 protons only. So the electrostatic force of attraction between protons and electrons is greater in fluorine than in nitrogen. Hence atomic radius of fluorine is lesser than that of nitrogen.