00:01
It wants to know why this equation here, 34 .12, is negative.
00:04
So this equation says that the energy of an atom bound by two charges, or the energy of two charges bound to one another, like in an atom, is negative k, which is just a constant, times e squared, which is the charge of either an electron or a proton, times two a knot.
00:22
A, here is the bores radius, times one over n squared, where n is just the value of the orbital we're dealing with.
00:28
So the reason that it's negative is because the electron is bound to the proton, and it would take energy to separate them.
00:36
So when energy is provided by an external source, it's going to be a positive energy...