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Explain why (i) the three electrons pr...

Explain why
(i) the three electrons present in 2p subshell nitrogen remain unpaired.
(ii) in potassium, the 19th electron enters into 4s subshell instead of 3d subshell,
(iii) chromium has configuration `3d^(5) 4s^(1)` instead of `3d^(4), 4s^2,`
(iv) the electronic configuration of zinc can be represented as `[Ar] 3d^(10) 4s^(2)?`

Text Solution

Verified by Experts

(i) In accordance to Hund.s rule of maximum multiplicity
(ii) Energy of 4s subshell is lower then that of 3d subshell.
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