c. Atomic radius goes on increasing down a group.

Question

7. Write scientific reasons.
c. Atomic radius goes on increasing down a group.

Answer 1

i. As we move from top to bottom in a group, number of shells increases.
ii. The outermost electrons go farther and farther from the nucleus, extending the radius and ultimately increasing the size of the atom even though the nuclear charge increases. Hence, atomic radius goes on increasing down a group.