JEE Main 2017 · 9 Apr · Shift 1 · Chemistry Q41

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ChemistrySingle correct+4 / -1Question 41 of 90

The electronic configuration with the highest ionization enthalpy is :

[Ne]

3s^23p^1

[Ne]

3s^23p^2

[Ne]

3s^23p^3

[Ar]

3d^{10}4s^24p^3

Answer and worked solution

Official answer: C

$[\ce{Ne}]3s^23p^3$ is phosphorus, with a stable half-filled p subshell, so it has a higher ionisation enthalpy than Al and Si. Arsenic, below it in the group, is lower.

Topics:Ionisation enthalpy

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JEE Main 2017 · 9 Apr · Shift 1, Chemistry question 41