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MHT CET2017Chemistryd and f Block Elements

Which of the following statements is incorrect for pair of elements Zr - Hf?

Options

  1. ABoth possess same number of valence electrons
  2. BBoth have identical atomic sizes
  3. CBoth have almost identical ionic radii
  4. DBoth of these belong to same period of periodic table

Correct answer

D. Both of these belong to same period of periodic table

Step-by-step solution

Zr-Hf are chemical twins and are present in period 5 t h and 6 t h respectively.

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