Question

Choose the incorrect statement in view of Mendeleev's Periodic Table

• A. Position of hydrogen was clear.
• B. Atomic masses were not strictly followed.
• C. Elements were arranged in order of their atomic masses
• D. Isotopes of elements were placed at same position.

Answer 1

The correct option is A

Position of hydrogen was clear.

Mendeleev did not explain the position of hydrogen in his periodic table.