_ are such nuclei of an element that have the same mass number A, but have different charge numbers Z.
Correct answer: B. Isobars
- A. Isotopes
- B. Isobars
- C. Isomers
- D. Isotherms
Explanation
Isobars are nuclei that have the same mass number (A), but a different atomic number (Z). Isobars should not be confused with isotopes, which share the same atomic number, and therefore belong to the same chemical element, but have varying mass numbers. Isomers are two or more nuclides that consist of the same no. of protons and the same no. of neutrons but have different energy and manner of radioactive decay, and that exist for a measurable interval of time. Hence, option B is correct.
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