HARDMCQ SINGLEJEE Mains ChemistryInorganic ChemistryPeriodic PropertiesAchiever Section

If the Aufbau principle had not been followed, Ca (Z = 20) would have been placed in the:

A.s-block

B.p-block

C.d-block✓ Correct

D.f-block

Explanation

Electronic without following Aufbau principle is 2 2 6 2 6 2 1s 2 2 3 3 3 s p s p d The last electron enters in d-subshell. Thus, Ca has been placed in the d-block.

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