Question

Which of the following pairs would have larger size ? Explain your answer

a) k or k+​

b) Br or Br-

c) O2- or F-

Answer 1

k

br-

o2- ion

Step-by-step explanation:

a/k ion has a larger size than k+ ion bc of the size of the radius it is always smaller compared to the parent ion .

b/bc it is an anion and it always has a large size compared to the parent ion (the same thing as the first one)

c/both the anions are isoelectornic species .Since the nuclear charge of O2- ions is small,its size is therefore more than the F- ion