19. State the achievements (merits) of Mendeleev's periodic table.
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Mendeelev law predicted the existence of some elements that had not been discovered at that time. Mendeleev could predict the properties of several elements on the basis of their positions in the periodic table. Mendeleev periodic could accommodate noble gases.
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Merits:- Mendeelev law predicted the existence of some elements that had not been discovered at that time. Mendeleev could predict the properties of several elements on the basis of their positions in the periodic table. Mendeleev periodic could accommodate noble gases.Mar
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