Question

The atomic radii of transition elements belonging to a particular series ______ with increase in atomic number.

Answer 1

The atomic radii of transition elements belonging to a particular series decrease with increase in atomic number.

Explanation:

As we move across a transition series, electrons are added to the (n – 1) d-subshell, and the effective nuclear charge increases. Due to the poor shielding by d-electrons, the increased attraction causes a slight decrease in atomic radii across the period.