Isotopes mean the elements have the same:
Correct answer: D. All of these
- A. Atomic number
- B. Proton number
- C. Different mass number
- D. All of these
Explanation
Option D is correct since isotopes have the same atomic number, same proton number, and different mass numbers.Option A is incorrect as it mentions an only the atomic number.Option B is incorrect as it mentions only the proton number.Option C is incorrect as it mentions only 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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