Question

The first periodic law stated by Mendeleev was

• A. there is no correlation in the properties and atomic weights of the elements
• B. the properties of the elements are a periodic function of their atomic numbers
• C. the properties of the elements are a periodic function of their atomic weights
• D. the properties of the elements are a periodic function of their empirical formula.

Answer 1

Answer: (C)

The first periodic law stated by Mendeleev was, "the physical and chemical properties of the elements are a periodic function of their atomic weights (atomic masses)." The elements having similar properties appeared in the same group (vertical column).