63 elements were known at the time of Mendeleev. The elements which were not known at the time of Mendeleev but later found to have the same properties as predicted by Mendeleev were Aluminium, Boron, Silicon and Manganese.
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How many elements were known at the time of Mendeleev?Name the elements which were not known at the time of Mendeleev, but when discovered later found to have the same properties predicated by Mendeleev.
63 elements were known at the time of Mendeleev. The elements which were not known at the time of Mendeleev but later found to have the same properties as predicted by Mendeleev were Aluminium, Boron, Silicon and Manganese.
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