Nuclei having the same mass number but different atomic number are____________?
Correct answer: B. Isobars
- A. Isotopes
- B. Isobars
- C. Isotones
- D. Isomers
Explanation
Nuclei with the same mass number A but different atomic numbers Z are called isobars, because they contain the same total number of nucleons but different numbers of protons. The likely mistake is choosing isotopes, which have the same atomic number but different mass numbers.
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About Composition of Atomic Nuclei
Atomic nuclei contain positively charged protons and electrically neutral neutrons, collectively called nucleons. Questions use atomic number, mass number and nuclear notation to identify isotopes, isobars and isotones, and may connect nuclear composition with nuclear charge, mass defect, binding energy and the stability of the nucleus.
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