Question

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

• A. Both possess same number of valence electrons
• B. Both have identical atomic sizes
• C. Both have almost identical ionic radii
• D. Both of these belong to same period of periodic table

Answer 1

Answer: (D)

Both of these belong to same period of periodic table

Answer 2

The statement (D), "Both of these belong to same period of periodic table" is incorrect statement. The correct statement is, "Zr belongs to the fifth period and Hf belongs to the sixth period".