Question

7. Which one of the following pairs lists the species with the smaller radius first?
O F and C
O Br^_ and Br
OS and O
O Ca and Ca²+

Answer 1

Answer:

Correct option is

B

The atomic radius is lower due to the high effective nuclear charge (due to poor shielding by inner electrons).

In group (a), has the least atomic radius.

In group (b), has the least atomic radius.

In group (c), has the least atomic radius.

In group (d), has the least atomic radius.

Hence option is correct.

Video Explanation