Question

Which of the following statement is correct with regards to the classification of elements?

• A. Elements in modern periodic table are arranged on the basis of increasing atomic masses.
• B. Elements in Mendeleev’s periodic table are arranged on the basis of increasing atomic numbers.
• C. Atomic number defines total number of neutrons in the nucleus.
• D. The physical and chemical properties of elements are the periodic function of their atomic numbers.

Answer 1

The correct option is D

The physical and chemical properties of elements are the periodic function of their atomic numbers.

Modern periodic law states that the physical and chemical properties of elements are the periodic function of their atomic numbers. Modern periodic table is a chart of elements in which the elements have been arranged in an increasing order of their atomic numbers. Atomic number is the number of protons in the nucleus or number of electrons revolving around the nucleus of an atom. According to Mendeleev’s periodic law, the properties of elements are periodic function of their atomic masses. In the Mendeleev’s periodic table, elements are arranged in order of increasing atomic masses and the elements with similar properties occur at regular intervals.