Question

The increasing order of the first ionization enthalpies of the elements $B,P,S$ and $F$ is:

• A. $F<S<P<B$
• B. $P<S<B<F$
• C. $B<P<S<F$
• D. $B<S<P<F$

Answer 1

Answer: (D)

$B<S<P<F$

The increasing order of the first ionization enthalpies of the elements $B,P,S$ and $F$ is $B<S<P<F$.

This is because the ionization enthalpy of the elements increases as the nuclear charge increases.

Nuclear charge increases across the period and decreases down the group.

So the order of nuclear charge of given elements is $B<S<P<F$.

Hence option D is correct.