Q. 12 D5.0( 1 Vote )

Comprehension giv

Answer :

Electronic configuration of element with atomic number 43 is 1s2 2s2 2p6 3s2 3p6 3d5 4s3 4p64d5 5s2. As the last electron lies in the 5th shell therefore this element belongs to the 5th period. Element just above this belongs to the 4th period with atomic number 43-18= 25.

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