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Aufbau Principle

Which of the ...

Question

Which of the following represents the correct sequence of energy levels of the shells and sub shells?

2s < 3p < 1s < 4d

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4p > 3p > 4s > 2s

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3d > 4s > 3p > 1s

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2p < 4d < 2f < 1s

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Solution

The correct option is B 4p > 3p > 4s > 2s
Electrons fill into shells, subshells, and orbitals according to provision for the lowest energy arrangement or ground state electron configuration of an atom. The electrons in one subshell have exactly the same level of energy, with later subshells having more energy per electron than earlier ones.

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