Question

Atoms of different elements having the same mass number are known as :

• A. isotopes
• B. isobars
• C. isotones
• D. isomers

Answer 1

Answer: (B)

isobars

Isobars, are the atoms having the same mass number but different atomic number. For example, the atomic number of carbon and nitrogen is 6 and 7 respectively. Carbon-14 an isotope of carbon has a mass number of 14 which is same as that of nitrogen and hence carbon-14 and nitrogen are isobars.