Question

Arrange the following elements in order of decreasing negative value of electron gain enthalpy and ionisation enthalpy B, C, N, O? ​

Answer 1

Answer:

so, arrangement of ionization energy is S < P < O < N (b) increasing order of negative electron gain enthalpy normally ... (c) increasing order of non metallic.

Answer 2

Answer:

The electron gain enthalpy or the negative electron gain enthaply is depended on the size of the atoms. Which is more is the size of the atom, more is the negative electron gain enthalpy. While in few cases this also depend on the configuration of the atoms being full or half filled. So, the trend will be given as.

O>C>B>N.

While the ionization energy is inversely proportional to the size of the atoms and directly to the effective nuclear charge. Also, half or full filled configuration have a higher ionization energy. So, the order will be B<C<N<O.