Question

In Mendeleev’s Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the Periodic Table later?
(a) Chlorine
(b) Silicon
(c) Oxygen
(d) Germanium​

Answer 1

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Germanium was discovered later which fit into the empty spaces left by Mendeleev and matched to the expected properties.

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Answer 2

Answer:

Germanium

extra information:

scadium ,gallium and germanium were elements for whom gaps were kept in Mendeleev's periodic table.