Question

Modern periodic law stated that__________.

• A. Properties of elements are a periodic functions of their atomic number
• B. Properties of elements are a periodic functions of their atomic mass
• C. Properties of elements are a periodic functions of their number as well as atomic mass
• D. None of above

Answer 1

The correct option is A Properties of elements are a periodic functions of their atomic number

So Mendeleevs Periodic law was modified and atomic number was adopted as the basis of the Modern Periodic Table. The Modern Periodic Law is stated as:
"Properties of elements are periodic functions of their atomic number". Atomic number is the basis for modern periodic table. Atomic number is the number of protons in the nucleus, it is also equal to the number of electrons in the atom.