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In his periodic table, Mendeleev could N...

In his periodic table, Mendeleev could NOT assign a correct position to _______

A

Oxygen

B

Carbon

C

Nitrogen

D

Hydrogen

Text Solution

Verified by Experts

The correct Answer is:
D
He found that hydrogen forms oxides like alkali earth metal with formula `H_2O` as NaZO. He also found that H is similar to halogens in forming diatomic molecule `H_2` like CIZ, Brz. So he could not assign a fixed position to H.
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