Em tham khảo nha :
\(\begin{array}{l}
b)\\
e = p = Z = 29\\
n = 29 \times 2 - 23 = 35\\
{m_X} = 29 \times 1,6726 \times {10^{ - 24}} + 29 \times 9,1094 \times {10^{ - 28}} + 35 \times 1,6748 \times {10^{ - 24}}\\
\Rightarrow {m_X} = 1,0715 \times {10^{ - 22}}g\\
{m_e} = 29 \times 9,1094 \times {10^{ - 28}} = 2,64 \times {10^{ - 26}}g\\
T = \dfrac{{2,64 \times {{10}^{ - 26}}}}{{1,0715 \times {{10}^{ - 22}}}} = 2,4638 \times {10^{ - 4}} \approx 0\\
c)\\
{m_X} = \dfrac{1}{{2,4638 \times {{10}^{ - 4}}}} = 4058,7052g
\end{array}\)
