Minimum first ionisation energy is shown by which electronic configuration?

Chemistry · NEET · NTA Exams — Classification of Elements and Periodicity in Properties

1.  1s² 2s² 2p⁶ 3s² 3p²
2. 1s² 2s² 2p⁶
3. 1s² 2s² 2p⁶ 3s¹
4. 1s² 2s² 2p⁵

Answer

(C) 1s 2 2s 2 2p 6 3s 1

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