12)What is the product of the beta minus decay of 90Sr? a. 91Sr b. 86Kr C. 90Y d

Question

12)What is the product of the beta minus decay of 90Sr? a. 91Sr b. 86Kr C. 90Y d. 90Rb e. 89Sr For ques tion 13, consider the section of the Chart of the Nuclides shown below: 9F 20 130 10 O WN 15N z. DB 'B 7Be "Be Be He He He He He He He He 13) Predict what kind of radioactive decay carbon-15 undergoes and why? a. Beta decay because it has too many neutrons. b. Positron decay because it has too many neutrons. c. Beta decay because it has too many protons. d. Positron decay because it has too many protons.

Explanation / Answer

12 - in beta minus decay 1 neutron converted into proton and minus beta particle so the atomic number of element increases while atomic mass does not change. And the product of decay is 90Y

13- for stable nucleus neutron and proton ratio must be nearly equal to 1. And in case of carbon 15 neutron is more than proton so neutron change in Proton by minus beta decay. Answer is A

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