Calculate the electric potetial at the surface of a gold nucles. Given, the radius of nucleus `= 6.6 xx 10^(-15)` m and atomic number of gold = 79.

Explanation

Here `r = 6.6 xx 10^(-15)m`, atomic Number z = 79
`:.` Charge on gold nucleus `q = +ze = 79 xx 1.60 xx 10^(-19) C`
`:.` Potential at the surface of gold nucleus
`V = q/(4 pi epsi_0.r) = (79 xx 1.60 xx 10^(-19) xx 9 xx 10^9)/(6.6 xx 10^(-15)) =1.72 xx 10^7V`.