Question

Which of the following are the characteristics of isotopes of an element?

(i) Isotopes of an element have the same atomic masses

(ii) Isotopes of an element have the same atomic number

(iii) Isotopes of an element show the same physical properties

(iv) Isotopes of an element show the same chemical properties

• A. (i), (iii) and (iv)
• B. (ii), (iii) and (iv)
• C. (ii) and (iii)
• D. (ii) and (iv)

Answer 1

The correct option is D

(ii) and (iv)

Explanation:

Isotopes:

• Isotopes are atoms of the same element which have the same atomic number and different mass numbers.”
• Isotopes of carbon are: ${}_6{}^{12}\mathrm{C}\mathrm{and}{}_6{}^{14}\mathrm{C}$.

Characteristics of Isotopes:

• Isotopes of an element have different mass numbers.
• Isotopes of an element have the same atomic number.
• Isotopes of an element have the same chemical property but different physical properties.

Hence, the correct option is (D).