A nucleus emits gamma (γ) photon what happens to its atomic number and actual mass:
Correct answer: A. Atomic number and actual mass remain unchanged
- A. Atomic number and actual mass remain unchanged
- B. atomic number and actual mass both decrease
- C. atomic number and actual mass both increase
- D. atomic number remains the same but the actual mass decrease
Explanation
Radioactivity is the phenomena in which an unstable nuclei emits alpha particle, beta particle or gamma ray in order to achieve stability. Thus the nuclei being unstable and having high energy is transmuted to stable nuclei. The stable nuclei is called daughter nuclei.
This question appeared on the ETEA MDCAT 2008 paper, which you can sit online with every answer explained.
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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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