Home Chemistry Classification of Elements and Periodicity Atomic and Ionic Radius The electronic configuration of an element i…
Chemistry Classification of Elements and Periodicity Atomic and Ionic Radius Single Correct MCQ
Published on: August 14, 2026

The electronic configuration of an element is 1s 2 , 2s 2 , 2p 6 , 3s 2 3p 3 . What is the atomic number of the element which is just below the above element in the periodic table?

A
34
B
49
C
33
D
31

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Text Solution

Verified by Experts
The correct answer is:
C

The element which present just below this element will have outermost electronic configuration as , so its full electronic configuration is and hence, its atomic number is 33.

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