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

Answer:

b and c

Explanation:

gaps were left for the elements silicon and germanium in Mendeleev's periodic table

Answer 2

Answer:

B ) D) is the right answer

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