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State the basic ideas which are violat...

State the basic ideas which are violated by each of the following electronic configurations and replace each by the correct configuration.
(a) `B_(5)-1s^(2)2s^(3)` , (b) `Na_(11)-1s^(2)2s^(2)2p^(6)2d^(1)` , (c) `K_(19)-[Ar]3d^(1)`, (d) `Ti_(22) -[Ar]4s^(2)4p^(2)`.

Text Solution

Verified by Experts

(a) Maximum capacity of 2s orbital of 2s orbital is 2. Therefore, the correct electronic configuration is `: 1s^(2) 2s^(2) 2p^(1)`.
(b) 2d orbital does not exist and the correct electronic configuration is `: 1s^(2) 2s^(2) 2p^(6) 3s^(1)`.
(c) 3d orbital is filled after 4s orbital . Therefore, the correct electronic configuration is : `[Ar]4s^(1)`.
(d) 3d orbital is filled before 4p orbital. Therefore, the correct electronic configuration is : `[Ar] 4s^(2) 3d^(2)`.
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