And remember here we said Shell, it uses the variable end and we're gonna say n equals R shell number, but also what we call our energy level. So this is shell to, and this would be shell three.

This is our second orbit, where we find three more electrons. This is our first orbit or our first shell so n equals one. And we're going to say if we take a look, here's our nucleus. Remember, electrons themselves are negatively charged. Orbiting around the nucleus in these orbits or shells are are electrons. Remember, protons are positively charged. Remember, That's where we find our protons and our neutrons. Now, if we're looking at boards model, remember, in our boards model, we have our nucleus here in orange and within the nucleus. And when it's dealing with jewels, the value is 2.178 times 10 to the negative 18 as the value for Rydberg constant. So their energy of position, we're gonna say associated with boards model is what we call the Rydberg constant. Now these shells used the variable end and a shell is just a grouping of electrons surrounding the nucleus that ties into their potential energy. Now in the boar model of the atom, electrons travel around the nucleus in circular orbits, which we call shells.

Carbon bohr model 6 7