InterviewSolution
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InterviewSolution
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A new electron enters the orbital when:(a) (n + I) is minimum(b) (n +I) is maximum(c) (n+ m) is minimum(d) (n+ m) is maximum |
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Answer» (n+l) rule is given by Aufbau. According to Aufbau’s principle, in the ground state of the atoms, the orbitals are filled in the order of their increasing energies. In other words, electrons first occupy the lowest energy orbital available to them and enter into higher energy orbital only when the lower energy orbitals are filled. The order in which the energies of orbitals increase and hence the order in which the orbitals are filled is as follows: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p….Energy of the orbital is directly proportional to (n+l) value. Orbital having low value of (n+l) will have less value of energy. So the electrons are filled in the increasing order of (n+l) or we can say that new electron enters in the orbital having (n+l) minimum. |
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