Which of the following reactions is an example of positron emission? $^{14}_6C ightarrow ^{14}_7N + ^0_{-1}eta$ $^7_4Be + ^0_{-1}e ightarrow ^7_3Li$ $^{139}_{62}Sm ightarrow ^{139}_{61}Pm + ^0_{+1}eta$ $^{58}_{26}Fe + ^1_0n ightarrow ^{59}_{26}Fe$ $^{232}_{90}Th ightarrow ^{228}_{88}Ra + ^4_2He
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Positron emission is a type of radioactive decay where a proton is converted into a neutron, and a positron (e+) is emitted. So, we need to look for a reaction where the atomic number (Z) decreases by 1, and the mass number (A) remains the same. Show more…
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