The first ionisation energies of alkaline earth metals are higher than those of the alkali metals. This isbecause

Question

The first ionisation energies of alkaline earth metals are higher than those of the alkali metals. This isbecause (A) there is increase in the nuclear charge of the alkaline earth metals (B) there is decrease in the nuclear charge of the alkaline earth metals (C) there is no change in the nuclear charge (D) None of the above

Tardigrade Admin · Accepted Answer

The first I.Es. of alkaline earth metals due higher than corresponding alkali metals due to higher - nuclear charge, smaller size fully filled ns2 configuration.

Q. The first ionisation energies of alkaline earth metals are higher than those of the alkali metals. This isbecause

there is increase in the nuclear charge of the alkaline earth metals

there is decrease in the nuclear charge of the alkaline earth metals

there is no change in the nuclear charge

None of the above

The first I.Es. of alkaline earth metals due higher than corresponding alkali metals due to higher - nuclear charge, smaller size fully filled $n s^{2}$ configuration.