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Chemistry · Classification of Elements and Periodicity in Properties

हिन्दी

Which of the following elements belongs to the 3d transition series?

  1. Lanthanum (\( Z = 57 \))
  2. Yttrium (\( Z = 39 \))
  3. Scandium (\( Z = 21 \))
  4. Actinium (\( Z = 89 \))

Correct answer · Option 3

Scandium (\( Z = 21 \))

Explanation

The 3d transition series starts with scandium (\( Z = 21 \)) and ends at zinc (\( Z = 30 \)).

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