State and explain Modern Periodic Law.

In 1913, Moseley stated that the physical and chemical properties of the elements are determined by their atomic numbers instead of their atomic masses. The acceptance of atomic number as the fundamental property of an element led to the development of modern periodic law. It states that “Physical and chemical properties of the elements are a periodic function of their atomic numbers.” It means that if the elements are arranged in order of their increasing atomic numbers, the elements with similar properties recur after certain regular intervals.