Question

Which of the following are the characteristics of isobars of an element?
(i) Isobars of an element have same number of neutrons.
(ii) Isobars of an element have same number of protons and neutrons.
(iii) Isobars of an element have similar physical properties.
(iv) Isobars of an element have same mass number.

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

Answer 1

The correct option is D (ii), (iii) and (iv)

Properties of Isobars:

1. Isobars of an element have same number of protons and neutrons.
   
2. Their atomic masses are nearly equal.
3. Isobars are elements, which are chemically different but physically same.
   
4. Isobars of an element have same mass number.
   

Hence it is (ii), (iii) and (iv)