JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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The electronic configuration of elements A, B and C are

[He] 2 s^1,[{Ne}] 3 s^1

and

[{Ar}] 4 {s}^1

respectively. Which one of the following order is correct for the first ionization potentials (in

\mathrm{kJ} \mathrm{mol}{ }^{-1}

) of A, B, C?

View answer and explanation

Correct option: A

A > B > C

Option A (A > B > C) is correct because ionization potential decreases down the group as the outermost electron is further from the nucleus.

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