Gaokao Physics Practice Question

表示放射性元素碘 131 （${ }_{53}^{131} \mathrm{I}$ ）$ \beta$ 衰变的方程是

1. A.${ }_{53}{ }^{131} \mathrm{I} \rightarrow _{51}^{127} \mathrm{Sb}^{2}{ }_{2}{ }^{4} \mathrm{He}$
2. B.${ }_{53}{ }^{131} \mathrm{I} \rightarrow _{54}^{131} \mathrm{Xe}^{+} 1^{0} \mathrm{e}$
3. C.${ }_{53}{ }^{131} \mathrm{I} \rightarrow{ }_{53}{ }^{130} \mathrm{I}+{ }_{0} 1 \mathrm{n}$
4. D.${ }_{53}{ }^{131} \mathrm{I} \rightarrow _{52}^{130} \mathrm{Te}^{+}{ }_{1}{ }^{1} \mathrm{H}$