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6 Radioactivity

Two successive nuclear changes occur. The letters P, Q and R label nuclei, and S labels an emitted particle.

{}^{226}_{88}\mathrm{P}\rightarrow{}^{A_1}_{Z_1}\mathrm{Q}+{}^{4}_{2}\alpha

{}^{A_1}_{Z_1}\mathrm{Q}\rightarrow{}^{222}_{87}\mathrm{R}+{}^{A}_{Z}\mathrm{S}

Calculate the mass number, $A_1$ , and the charge number, $Z_1$ , of nucleus Q.

[2]

Use your answer to calculate the mass number, $A$ , and the charge number, $Z$ , of particle S. State the type of particle S.

[3]

6 Radioactivity Questions

Two successive nuclear changes occur. The letters P, Q and R label nuclei, and S labels an emitted particle.

{}^{226}_{88}\mathrm{P}\rightarrow{}^{A_1}_{Z_1}\mathrm{Q}+{}^{4}_{2}\alpha

{}^{A_1}_{Z_1}\mathrm{Q}\rightarrow{}^{222}_{87}\mathrm{R}+{}^{A}_{Z}\mathrm{S}

Calculate the mass number, $A_1$ , and the charge number, $Z_1$ , of nucleus Q.

[2]

Use your answer to calculate the mass number, $A$ , and the charge number, $Z$ , of particle S. State the type of particle S.

[3]