Question

As per the modern periodic law the physical and chemical properties of the elements are in periodic function of their:

• A. atomic number
• B. electronic configuration
• C. atomic weight
• D. atomic size

Answer 1

The correct option is A atomic number

As per the modern periodic law the physical and chemical properties of the elements are periodic functions of their atomic numbers.
It was proved by Moseley that the most fundamental property of an element is its atomic number.