An electron and a proton are lying 10 cm apart.The ratio of electrostatics force and gravitational force between them will be

F_g = Gm₁m₂/r²

F_e = kq₁q₂/r²

K=9.0x10⁹
G=6.67x10^-11
Mass of proton aprox: 1.672x10^-27 kg
Charge of a proton:    1.602x10^-19

Mass of electron aprox:  9.1x10^-31 kg
Charge of a electron:    -1.602x10^-19

Fe/Fg = Gm₁m₂/kq₁q₂/

         =4.4x10^-40

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Regads

Ramesh