Question

The classification of elements in the modern periodic table is based on:

• A. increasing order of their atomic number
• B. atomic weight
• C. atomic volume
• D. equivalent weight

Answer 1

The correct option is A increasing order of their atomic number

In the modern periodic table, the elements are arranged according to the increasing order of their atomic numbers.

The modern periodic law says that the chemical properties of elements are periodic functions of their atomic numbers and electronic configuration.

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