The ratio of the density of a neutron (r = r₀A^1/3)to the density of a classical electron (r_e = ke²/m_ec² = 2.8 *10 ^- ¹⁵ m)is

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The ratio of density of a neutron to a classical electron is given by r/r_e. Substituting the values of the constants, we get: r/r_e = k*(m_e/m_n)*(c^2)/(h^2) r/r_e = (2.8*10^-10)*(9.11*10^-31/1.67*10^-27)*((3*10^8)^2)/((6.626*10^-34)^2) r/r_e = 2.3*10^12 Therefore, the answer is B, 2.3*10^12 or 2.3 F1F1F1S1F1F1F10 10⁴.

The Ratio of the Density of a Neutron (R =