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The last electron enters a (n-1)d orbital only after the ns subshell is completely filled.Explain. |
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Answer» A d subshell is present in the shells with n ≥ 3 and according to the (n+1) rule, the energy of ns orbital is less than that of the (n-1)d orbital. As a result, the last electron enters a (n-1)d orbital only after the ns subshell is completely filled. |
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