Em tham khảo nha :
1)
\(\begin{array}{l}
{d_{ngtu}} = 10 \times {10^{ - 10}}m = 0,1nm\\
{d_{hatnhan}} = {10^{ - 14}}m = {10^{ - 5}}nm\\
{d_P} = {d_n} \approx 5 \times {10^{ - 6}}nm\\
{d_H} = 0,0265nm\\
2)\\
{m_C} = 6 \times 1,6726 \times {10^{ - 27}} + 6 \times 1,6748 \times {10^{ - 27}} + 6 \times 9,1094 \times {10^{ - 31}}\\
\,\,\,\,\,\,\, = 2,008986 \times {10^{ - 26}}kg\\
{m_H} = 1 \times 1,6726 \times {10^{ - 27}} = 1,6726 \times {10^{ - 27}}kg\\
{m_O} = 8 \times 1,6726 \times {10^{ - 27}} + 8 \times 1,6748 \times {10^{ - 27}} + 8 \times 9,1094 \times {10^{ - 31}}\\
\,\,\,\,\,\,\, = 2,6786 \times {10^{-26}}kg\\
1u = 1,6605 \times {10^{ - 27}}kg
\end{array}\)
