Question

Choose the correct pair of isotopes.

• A. ${}_1^{1}H$
• B. ${}_1^{2}H$
• C. ${}_6^{12}C$
• D. ${}_6^{14}C$
• E. ${}_{53}^{127}I$
• F. ${}_{53}^{131}I$
• G. ${}_2^{3}He$
• H. ${}_2^{4}He$

Answer 1