Question

In the modern periodic table, elements are arranged in the order of their

• A. Increasing atomic masses
• B. Increasing atomic numbers
• C. Decreasing atomic masses
• D. Decreasing atomic numbers

Answer 1

The correct option is B

Increasing atomic numbers

Henry Moseley modified Mendeleev’s periodic law and developed the modern periodic law. This law states that the properties of elements are the periodic function of their atomic numbers. He arranged the elements in the increasing order of their atomic numbers, thereby leading to the classification of elements in the modern periodic table.