Question

a
a. Mendeleev's periodic law,​

Answer 1

Explanation:

Mendeleev's periodic law states that the properties of elements are the periodic functions of their atomic masses. Elements in each group have similar physical and chemical properties

Answer 2

Answer:

Mendeleev's periodic law states that the properties of elements are the periodic functions of their atomic masses. Elements in each group have similar physical and chemical properties (valency, melting point). The periods are made with elements written in rows of increasing atomic masses.