Ta có: \(d_O\left(ntu\right)=10^{-8}\left(cm\right)\)
\(\Rightarrow V_O\left(ntu\right)=\dfrac{4}{3}\pi\left(\dfrac{10^{-8}}{2}\right)^3=5,24.10^{-25}\left(cm^3\right)\)
\(d_O\left(h.nhan\right)=20^{-12}\left(cm\right)\)
\(\Rightarrow V_O\left(h.nhan\right)=\dfrac{4}{3}\pi\left(\dfrac{10^{-12}}{2}\right)^3=5,24.10^{-37}\left(cm^3\right)\)
\(b)\) Ta có: \(m_O\left(ntu\right)=16.1,6605.10^{-24}=2,7.10^{-23}\left(g\right)\)
\(\Rightarrow D_O\left(ntu\right)=\dfrac{m_O\left(ntu\right)}{V_O\left(ntu\right)}=\dfrac{2,66.10^{-23}}{5,24.10^{-25}}=50,8\)\((g/cm^3)\)
Ta có: \(\Rightarrow mO_{\left(h.nhan\right)}\approx mO_{\left(ntu\right)}=2,66.10^{-23}\left(g\right)\)(Do khối lượng hạt e không đáng kể)
\(\Rightarrow D_O\left(h.nhan\right)=\dfrac{m_O\left(h.nhan\right)}{V_O\left(h.nhan\right)}=\dfrac{2,66.10^{-23}}{5,24.10_{-37}}=5,08.10^{13}\)\((g/cm^3)\)
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