Which of the following is not a merit of Mendeleev's periodic table?
What were the main demerits of Mendeleev's periodic table?
(i) Hydrogen has been placed in group I though it resembled to group VII as well.
(ii) Positions of some elements was not justified.
(iii) Isotopes were not given separate places.
(iv) Lanthanides and actinides were not included in the table.
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The periodic table of today owes its development to two chemists namely:
The first periodic law stated by Mendeleev was:
304 docs|275 tests
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304 docs|275 tests
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