Calculate the electric potential at the surface of a gold nucleus. Given radius of nucleus = `6.6 xx 10^-15 m` and atomic wight of gold is 79.

What is the electric potential at the surface of an iron nucleus? The radius of the nucelus is 4.2 xx 10^-15 m and the atomic number is 26.

The electric potential at the surface of an atomic nucleus (Z=50) of radius 9.0 xx 10^-15 m is

Calculate the radius of oxygen nucleus .Given that R_0 = 1.1 xx 10^(-15) m .

Find the mass of earth (Given the radius of earth R= 6.4 xx 10^6 m) .

Calculate the mass of the earth. Given radius of the earth =6.4xx10^-6 m and g = 9.8 m//s^2

An electron is circulating around the nucleus of a hydrogen ato in a circular orbit of radius 5.3 cxx10^-11 m. Calculate the electric potential energy of the atom in eV. What would be the electric potential due to a helium nucleus at the same radius. Given, that (4piepsilon_0)^-1 = 9xx10^9 m F^-1 and e = 1.6 xx 10^-19 C .