Question

Atoms with identical atomic number but different atomic mass number are known as

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

Answer 1

Answer: (C)

isotopes

Answer 2

Atoms with identical atomic number but different atomic mass number are called isotopes, e.g.
$_{1}H^{1}, _{1}H^{2}$ and $_{1}H^{3}$
are three isotopes of hydrogen.