Question of The Day16-05-2021

Which of the following orbit has the lowest energy?


Correct Answer : c ) 2s

Explanation :

The energy required to take an electron present in that orbital to infinity or the energy released when an electron is added to that orbital from infinity is known as Energy of the Orbital. It depends on two factors - Principle quantum number (n) and azimuthal quantum number (l) i.e. it depends on shell and subshells. 2s is the lowest energy orbital.

Electrons are filled as per "n+l" rule: 1s,2s,2p,3s,3p,4s,3d,4p,5s,4d,5p,6s,4f,5d,6p,7s,5f,6d,7p

Hence, option (c) is correct.

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