Question
Isobars are atoms having the same number of
- protons
- neutrons
- electrons
- protons + neutrons
Answer
protons + neutrons
Explanation
Isobars are atoms having the same mass number (A), which means they have the same total number of protons and neutrons, but different atomic numbers (Z) and different numbers of protons. Isobars have different chemical properties due to their different atomic numbers.