D In a $\gamma$-decay, the values of $A$ and $Z$ do not change. ${ }_{Z}^{\mathrm{A}} \mathrm{x} \rightarrow{ }_{\mathrm{Z}}^{\mathrm{A}} \mathrm{x}+\gamma$.
D In a $\gamma$-decay, the values of $A$ and $Z$ do not change. ${ }_{Z}^{\mathrm{A}} \mathrm{x} \rightarrow{ }_{\mathrm{Z}}^{\mathrm{A}} \mathrm{x}+\gamma$.
D In a $\gamma$-decay, the values of $A$ and $Z$ do not change. ${ }_{Z}^{\mathrm{A}} \mathrm{x} \rightarrow{ }_{\mathrm{Z}}^{\mathrm{A}} \mathrm{x}+\gamma$.
D In a $\gamma$-decay, the values of $A$ and $Z$ do not change. ${ }_{Z}^{\mathrm{A}} \mathrm{x} \rightarrow{ }_{\mathrm{Z}}^{\mathrm{A}} \mathrm{x}+\gamma$.