Assertion : and are isoelectronic but ionic radius is less than that of

CHEMISTRY · Subjective · AP · Chemistry · Atomic Structure and Properties · Atomic Structure and Properties

Problem

Assertion :

\text{Na}^+

and

\text{Al}^{3+}

are isoelectronic but ionic radius

\text{Al}^{3+}

is less than that of

\text{Na}^+

. Reason : The magnitude of effective nuclear charge on the outershell electrons in

\text{Al}^{3+}

is greater than that in

\text{Na}^+