Question

Which one of the following statements for D.I. Mendeleev is incorrect?

विकल्प

• He authored the textbook – Principles of Chemistry.

• At the time he proposed the Periodic Table of Elements, the structure of atoms was known.

• Element with atomic number 101 is named after him.

• He invented an accurate barometer.

Answer 1

At the time he proposed the Periodic Table of Elements, the structure of atoms was known.

Explanation:

At the time of D.I. Mendeleev, the structure of atom was not known.