Question

In Mendeleev's periodic table, gaps were left for the elements to be discovered later on. An element which found a vacant place in the periodic table later on is
(a) Be
(b) Si
(c) Ge
(d) Se

Answer 1

Answer:

c) Ge

Explanation:

Chlorine, oxygen and silicon were included in Mendeleev's periodic table. Germanium was discovered later which fit into the empty spaces left by Mendeleev and matched to the expected properties.

Answer 2

Germanium is the correct answer