Question

If A, Z, and N denote the mass number, the atomic number, and the neutron number for a given nucleus, we can say that

• A. $N=Z+A$
• B. isobars have the same A but different Z and N
• C. isobars have the same Z but different N and A
• D. isobars have the same N but different A and Z

Answer 1

Answer: (B)

isobars have the same A but different Z and N

Isobars differ in atomic number (or number of protons) but have the same mass number.