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Which of the following statement(s) is/a...

Which of the following statement(s) is/are incorrect for pair of element Zr-Hf ?

A

Both posses same number of valence electrons

B

Both have identical sizes

C

Both have almost identical radii

D

Both of these belong to same period of periodic table

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The correct Answer is:
D
Zirconium (Zr)with atomic number - 40and Hafnium (Hf) with atomic number - 72 belongs of period 5th and 6th respectively.
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