Question

name an element whose properties were predicted on the basis of its position in Mendeleev's periodic table

Answer 1

hydrogen is the metal which is predicted on the basis of its position mendeleev's periodic table

Answer 2

there are three elements I have know that mendeleev predicted them and left some gaps in periodic table

these are :
eka boron(now know as scandium)
eka aluminium(galium)
eka silicon (germanium)

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