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KCET2008ChemistryClassification of Elements and Periodicity in Properties

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

The electronic configuration of element with atomic number 21 is 1 ~s ², 2 ~s ², 2 p ⁶, 3 ~s ², 3 p ⁶, 4 ~s ², 3 ~d ¹ Since this element contains partly filled orbital, so it is a -block element. -block elements are also known as transition elements.

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