Chemistry

Problem

In the proton capture process

^{27}_{13}\mathrm{Al} + ^{1}_{1}\mathrm{p} \;\rightarrow\; ^{28}_{14}\mathrm{Si} + ?

a. (i) Name the missing particle. b. (ii) Explain briefly why this particle is emitted even though the mass number and the atomic number are already balanced in the reaction.

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