State the merits of Mendeleev's classification of elements. (b) Describe two anomalies of Mendeleev's periodic classification of elements.
ChemistryClass 10ICSEAnswered 27 Mar 2026
Answer
- Merits;
- Predicted the existence of certain elements such as gallium, scandium and
- Predicted the properties of various elements based on their positions in the periodic table
- Mendeleev’s periodic table could place group 18 elements called noble gases in the periodic (b)1.This could not explain the position of isotopes having same chemical properties but different atomic masses. So the isotopes of same element should be given different place in periodic table and arranged in increasing order of their atomic masses
- Mendeleev’s periodic table could not assign a proper place for the element hydrogen