Question

Mendeleev’s Periodic law is based on

• A. Atomic Number
• B. Number of electron
• C. Atomic mass
• D. None of the above

Answer 1

The correct option is C Atomic mass

In 1869, Mendeleev formulated a law, now known as the periodic law. The law is stated as follows:
The properties of elements are periodic functions of their atomic masses. This means, if the elements are arranged in order of increasing atomic masses then those with similar properties are repeated at regular intervals.