Question

Question #e7441

Answer 1

Atomic radius generaly decreases as we move from left to right.

Explanation:

The radius of Noble gases is the greatest as :

vanderwall radius`>`metallic radius`>`covalent radius

As we move from left to right, the effective nuclear charge(`Z_(eff)`)
increases but there is no change in shielding effect(`sigma`) of electrons as they are added to the outermost shell of atom.Hence the nucleus pulls the electrons closer to itself decreasing the atomic radius