Amongst the following elements whose electronic configurations are given below, the one having the highest ionisation enthalpy is

(i) [Ne]3s2 3p1

(ii) [Ne]3s2 3p3

(iii) [Ne]3s2 3p2

(iv) [Ar]3d104s24p3

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    Answered by

    Vishal Baghel | Contributor-Level 10

    3 months ago

    This is a Multiple Choice Questions as classified in NCERT Exemplar

    Ans: Option (ii)

    Aluminium has [Ne]3s2 3p1  electronic configuration. Phosphorus has [Ne]3s2 3p3. The electronic configuration of silicon is [Ne]3s2 3p2 and the electronic configuration of arsenic is   [Ar]3d104s24p3.

    Ionisation energy increases as the atomic number in a period increases and decreases on moving down the group. It is also known that the ionisation enthalpy of group 15 elements is more than group 16 elements as group 15 has half-filled p-subshells which gives extra stability.Thus, the electronic configuration having the highest ionization entha

    ...more

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