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6 Radioactivity

A student proposes this equation for a decay.

{}^{214}_{83}\mathrm{Bi}\rightarrow{}^{210}_{82}\mathrm{Pb}+{}^{4}_{2}\mathrm{He}+{}^{0}_{+1}\mathrm{e}

Which single change balances the equation?

[1]

Replace $24He{}^{4}_{2}\mathrm{He}$ with $01n{}^{1}_{0}\mathrm{n}$ .

Replace $83214Bi{}^{214}_{83}\mathrm{Bi}$ with $83213Bi{}^{213}_{83}\mathrm{Bi}$ .

Replace $+10e{}^{0}_{+1}\mathrm{e}$ with $00γ{}^{0}_{0}\gamma$ .

Replace $+10e{}^{0}_{+1}\mathrm{e}$ with $−10e{}^{0}_{-1}\mathrm{e}$ .

6 Radioactivity Questions

A student proposes this equation for a decay.

{}^{214}_{83}\mathrm{Bi}\rightarrow{}^{210}_{82}\mathrm{Pb}+{}^{4}_{2}\mathrm{He}+{}^{0}_{+1}\mathrm{e}

Which single change balances the equation?

[1]

Replace $24He{}^{4}_{2}\mathrm{He}$ with $01n{}^{1}_{0}\mathrm{n}$ .

Replace $83214Bi{}^{214}_{83}\mathrm{Bi}$ with $83213Bi{}^{213}_{83}\mathrm{Bi}$ .

Replace $+10e{}^{0}_{+1}\mathrm{e}$ with $00γ{}^{0}_{0}\gamma$ .

Replace $+10e{}^{0}_{+1}\mathrm{e}$ with $−10e{}^{0}_{-1}\mathrm{e}$ .