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Question

If Aufbau rule is not followed in filling of sub orbitals, then block of the element will change in :
  1. K(19)
  2. V(23)
  3. Sc(21)
  4. Ni(28)

A
Sc(21)
B
V(23)
C
K(19)
D
Ni(28)
Solution
Verified by Toppr

If Aufbau rule is not followed,
electronic configuration is K:
1s2 2s2 2p6 3s2 3p6 3d1.
Last electron is in 3d(instead of 4s),
hence d block (but it is of s block)
in all other cases valence electron doesnt changes its position so block doesnt changes in those cases.

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