Ionic radius increases across the period from left to right .

The effective nuclear charge across the period (from left to right)

Atomic radii decreases as we move from left to right of periodic table. Justify your answer .

Across the period, electron affinity

Assertion (A): Atomic radius tends to decrease across a period. Reason (R): As we move from left to right along a period, the valence electrons are added to the same shell, nuclear charge increases and atomic radius decreases.

Explain the variation of atomic radius (i) across the period (ii) along the group