Which of the following configurations represents a noble gas?

Chemistry · Class 11 · CBSE — Classification of Elements and Periodicity in Properties

1. 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s²
2. 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4f ¹⁴ 5s²
3. 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶
4. 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p³

Answer

(C) 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 10 4 s 2 4 p 6 4 d 10 5 s 2 5 p 6

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