Chemistry
(a) Name an element whose properties were predicted on the basis of its position in Mendeleev's periodic table.
(b) Name two elements whose atomic weights were corrected on the basis of their positions in Mendeleev's periodic table.
(c) How many elements were known at the time of Mendeleev's classification of elements?
Periodic Table
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Answer
(a) Gallium (Eka aluminium)
(b) Gold and Platinum
(c) 63
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