Em tham khảo nha:
\(\begin{array}{l}
a)\\
{p_{{}_{29}^{63}Cu}} = {e_{{}_{29}^{63}Cu}} = {Z_{{}_{29}^{63}Cu}} = 29\\
{n_{{}_{29}^{63}Cu}} = A - p = 63 - 29 = 34\\
b)\\
n = {n_{{}_{29}^{63}Cu}} + 2 = 34 + 2 = 36\\
A = 29 + 36 = 65\\
\Rightarrow KHNT:{}_{29}^{65}Cu
\end{array}\)