What are the defects in the mendeleev's periodic table?

1.	What are the defects in the mendeleev's periodic table?
Answer» Hlo mate here is ur ans...... Anomalous PairsThe following pairs of elements don’t follow the follow Mendeleev’s Principles:Cobalt (58.9) with a higher atomic mass PRECEDES Nickel (58.6) in the periodic table.Tellurium (127.6) with a higher atomic mass than Iodine (126.9) precedes it in the periodic table.Grouping of chemically dissimilar ELEMENTSELEMENTS such as Copper and Silver bear no resemblance with the alkali METALS, but they have been placed together in the first group.POSITION of Isotopes *position of hydrogen* *The position of hydrogenHydrogen was not given a fixed position because it was considered in Group IA as well as in Group VIIA.* ❤️❤️Hope this helps u dear ❤️❤️ ✌️Pls MARK as brainliest ✌️ Don't forget to follow me :)

Answer»

Hlo mate here is ur ans......

Anomalous PairsThe following pairs of elements don’t follow the follow Mendeleev’s Principles:Cobalt (58.9) with a higher atomic mass PRECEDES Nickel (58.6) in the periodic table.Tellurium (127.6) with a higher atomic mass than Iodine (126.9) precedes it in the periodic table.Grouping of chemically dissimilar ELEMENTSELEMENTS such as Copper and Silver bear no resemblance with the alkali METALS, but they have been placed together in the first group.POSITION of Isotopes

position of hydrogen

The position of hydrogenHydrogen was not given a fixed position because it was considered in Group IA as well as in Group VIIA.

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