The number of electrons that fill the outer shell
Well that thing doesn’t obey the laws of physics at all. There’s a lot here that you won’t understand kid
that is a prediction for a future experiment based on previous experiment results.
(guessing what will happen in the future experiment based on the results of the past experiments)
Answer:
a) It moved to a lower potential
b) ΔФ = - 86.28 Volt
Explanation:
The energy of an charged particle and the electric potential are related by the potential al kinetic energies:

If we consider an electron:
m = 9.10938*10^-31 Kilogram
e = 1.60218*10^-19 Coulomb
And the potential diference may be calculed by:

Replacing all the values we get:
ΔФ = - 86.28 (Kilogram Meter^2)/(Coulomb Second^2) = -86.28 Volts