Question

for each of the following pairs indicate which of the two species is of large size
a) fe+3 or fe2+ b) mg2+ or ca2+​

Answer 1

Answer:

fe2+,ca2+

Explanation:

1. since size of cation is smaller than the parent ATM hence fe2+ is bigger than fe3+

2.ca2+ is isostructural to argon while mg2+ is isostructural to neon .Also argon is bigger than neon hence ca2+ is bigger than mg2+