Question

According to Mendeleev's periodic law, the properties of elements are a periodic function of:

• A. atomic number
• B. atomic weight
• C. number of electrons
• D. density

Answer 1

The correct option is B atomic weight

In 1869, Dmitri Mendeleev and Lothar Meyer individually came up with their own periodic law "when the elements are arranged in order of increasing atomic mass, certain sets of properties recur periodically."

Hence, the correct option is $\text{B}$