Bohr gave these concentric circles, these orbits numbers, representing

principal quantum numbers, 1, 2, 3, 4, et cetera, and they keep getting closer and

closer the further away you go, so the next one will be even closer, n equals 6,

and then a little bit closer together, and n equals 7, a little bit closer together,

n equals 8, so they're getting closer and closer together as you move further and

further away, but that is his proposed model.

Now, this model didn't hold up once you put another electron in,

we're going to talk more about this, we're going to talk more about calculations at

the energy in a later learning objective, but this is our first understanding of

the electronic structure of an atom, that is being,

proposed because of the line spectrum that was produced when the hydrogen gas glows.