Question

According to modern periodic law, the properties of elements are the periodic functions of their__________.

• A. atomic number
• B. mass number
• C. atomic size
• D. ionic size

Answer 1

Answer: (A)

atomic number

The modern periodic law states that the physical and chemical properties of the elements are the periodic function of the atomic numbers. The various elements with similar properties repeat after certain regular intervals.

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