Question

the ionization enthalpy of second period elements vary with atomic number as

Answer 1

The ionisation enthalpy of 2nd period elements vary with Atomic number since it is dependent on atomic size.(electronic configuration)

Answer 2

Explanation:

okBe′ and ′N′ comparatively more stable valence subshell than 'B' and 'O'.

Hence, the correct order of first ionisation enthalpy is:

Li<B<Be<C<O<N<F<Ne