b) Similar elements are placed in the same group in mendeleev's periodic table. This is one of the merits of mendeleev's periodic table. Write any two other merits of Mendeleev's periodic table.
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(i) Atomic masses of some elements were revised so as to give them proper place in the periodic table in accordance with their properties. ... The properties of these elements matched well with those predicted by Mendeleev. (iii) There was no place reserved for noble gases in Mendeleev.
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