Which one of the following has the lowest ionization energy?

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Question: Answered & Verified by Expert

Which one of the following has the lowest ionization energy?

ChemistryClassification of Elements and Periodicity in PropertiesWBJEEWBJEE 2011

Options:

A \(1 s^2 2 s^2 2 p^6\)
B \(1 \mathrm{~s}^2 2 \mathrm{~s}^2 2 \mathrm{p}^6 3 \mathrm{~s}^1\)
C \(1 \mathrm{~s}^2 2 \mathrm{~s}^2 2 \mathrm{p}^5\)
D \(1 \mathrm{~s}^2 2 \mathrm{~s}^2 2 \mathrm{p}^3\)

Solution:

1644 Upvotes Verified Answer

The correct answer is: \(1 \mathrm{~s}^2 2 \mathrm{~s}^2 2 \mathrm{p}^6 3 \mathrm{~s}^1\)

Hints: It's an alkalimetal; hence least I.P

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