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NTA Abhyas JEE Main2020ChemistryStructure of AtomPractice

Electronic configurations of few elements are given below. Mark the incorrect match.

Options

  1. A1 s 2 2 s 2 2 p 5 ; Most electronegative element
  2. B1 s 2 2 s 2 2 p 3 ; An element belonging to 3 period and 5 group
  3. C1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 8 4 s 2 ; A d-block element
  4. D1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 ; An element from 18 group

Correct answer

B. 1 s 2 2 s 2 2 p 3 ; An element belonging to 3 period and 5 group

Step-by-step solution

Since n = 2 so it belongs to 2 period and 5 group. It is nitrogen.

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