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COMEDK2017Chemistryd and f Block Elements

An element with atomic number 21 is a

Options

  1. Ahalogen
  2. Brepresentative element
  3. Ctransition element
  4. Dalkali metal

Correct answer

C. transition element

Step-by-step solution

Electronic configuration of element (21) is 1 s² 2 s² 2 p⁶ 3 s² 3 p⁶ 4 s² 3 d¹ It is a transition element as its last electron enters in d -orbital.

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