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Which of the following statements is INCORRECT for pair of elements Zr-Hf?A. Both possess same number of valence electrons.B. Both have identcial atomic sizes.C. Both have almost identical ionic radii.D. Both of these belong to same period of periodic table. |
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Answer» Correct Answer - D These are chemical twins Zr belongs to 5th period and 4th group. Hf belongs to 6th period and 4th group. |
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