Question

Which of the following is correct regarding isobars?

I. They have different atomic numbers

II. The have same mass numbers

A Only I Correct Answer Incorrect Answer
B Only II Correct Answer Incorrect Answer
C Both I and II Correct Answer Incorrect Answer
D Neither I nor II Correct Answer Incorrect Answer

Solution

Isobars have different atomic numbers because they have different numbers of protons. They have the same atomic mass because they have just enough neutrons to make the same total of nucleons.

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