Which of the following sets strictly represents anomalous pairs in Mendeleev's periodic table where — Periodic Table and Periodicity Chemistry Question
Question
Which of the following sets strictly represents anomalous pairs in Mendeleev's periodic table where the order of increasing atomic weight was violated to maintain chemical periodicity?
Answer: A
💡 Solution & Explanation
Mendeleev placed Ar(39.9) before K(39.1), Co(58.9) before Ni(58.6), and Te(127.5) before I(127) to group elements with similar chemical properties.
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