Bohr model
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Search complete. 16 mentions across 6 episodes found for "Bohr model".
Oct 29, 2026
Philip BallGUEST
They may well have done.
Philip BallGUEST
And they certainly may have heard of the Bohr atom.
Philip BallGUEST
because that's something that, I mean, my daughter has just been learning about the Bohr atom at school.
Philip BallGUEST
So, you know, we know that Bohr had something to do with the sort of theory of atoms.
Philip BallGUEST
But that's probably as far as it goes for a lot of people, if they know his name at all.
8 MINS LATER
Philip BallGUEST
Yeah, exactly.
Philip BallGUEST
So when we learn about, well, certainly when I learned about the atom, which was a long time ago, you hear, first of all, about Thomson's plum pudding model.
Philip BallGUEST
And then you hear about the Rutherford atom and then you hear about the Bohr atom.
Michael RussellHOST
Cool.
Michael RussellHOST
Other questions? This question goes back to the hydrogen spectrum, uh, lab we did and the Bohr model.
Michael RussellHOST
Now again, Bohr was able to figure out where those fingerprints were coming from, from the elements when nobody else could.
Michael RussellHOST
And he basically used a series of transitions, the changes in energy that we did on Tuesday.
Michael RussellHOST
And the question is here, how many emission lines are possible in the first five quantum numbers? So see if you can figure out here how many emission lines, top to bottom lines there would be in the first five energy levels.
Michael RussellHOST
We'll talk about it in a moment.
Michael RussellHOST
This Bohr model is often referenced as a type of a ladder, and the electrons are bouncing all up and down it.
Michael RussellHOST
So if this is the positive nucleus of the atom, then what Bohr's figured out is there's these rings of the ladder, if you will, that go progressively farther from the nucleus.
Dave FarinaHOST
I think he just doesn't understand, uh, what any of this means.
Dave FarinaHOST
Um, so he, he's teeing up the Bohr model, which we were all supposed to learn in 10th grade chemistry.
Dave FarinaHOST
Let's see how he screws it up.
Robert Edward GrantSOUNDBITE_SPEAKER
hydrogen.
Michael RussellHOST
It's gonna be drifting that way.
Michael RussellHOST
Any questions on that? [sniffs] So here's a problem that has to do with the Bohr model of the atom that we talked about in the hydrogen spectrum line.
Michael RussellHOST
This question, we've got n equals one, two, three, four, five.
Michael RussellHOST
Now, for hydrogen, you calculated these values for the energies of those values.
Michael RussellHOST
So see if you can think about it.
Michael RussellHOST
An emission line is higher n to lower n. Okay? So see if you can figure out how many emission lines we could theoretically observe in the first five lines of hydrogen.
Michael RussellHOST
Scientists had seen the fingerprints of elements, the sharp line spectrum, for quite a while, but nobody could figure out where they came from until the Bohr model popped in.
Michael RussellHOST
And Bohr kind of pulled this out of thin air, but it worked really well.
Dave FarinaHOST
This model was able to explain the emission spectrum of hydrogen and other elements, and by extension, the color of every object that reflects light.
Dave FarinaHOST
More information on the Bohr model can be found in the general chemistry series, or by clicking on the card you see right now.
Dave FarinaHOST
After this, de Broglie demonstrated that it is not just light that exhibits wave-particle duality, but particles of matter as well.
Dave FarinaHOST
This meant that the electron, just like any other particle, has a wavelength that depends on its momentum, which complicated matters for chemistry quite a bit.
Dave FarinaHOST
Because Newtonian mechanics is unable to fully describe this kind of behavior, we had to develop an entirely new field to do so, and that field is called quantum mechanics.
Dave FarinaHOST
This and the figures that contributed to its development will be the focus of the next few tutorials.
Dave FarinaHOST
Once again, tutorials 12 through 14 from the general chemistry course cover the photoelectric effect, the Bohr model of the hydrogen atom, wave-particle duality, and some basic quantum terminology in greater detail than we have mentioned here, so it is highly suggested that you take a moment to review these materials before proceeding with the modern physics course.
Dave FarinaHOST
If you are good to go, let's move on to some new concepts.
Melissa ColliniHOST
And another example of this system working is how we came to our current model of the atom.
Melissa ColliniHOST
So an early model of the atom is a very commonly known and seen model called the Bohr model.
Jam RobinsonHOST
Mm-hmm.
Melissa ColliniHOST
There were several people who were building up models of the atom, but the Bohr model of the atom is the idea, it's the one that we've seen-
Jam RobinsonHOST
Mm-hmm
Melissa ColliniHOST
... is that there's a nucleus in the middle, and that nucleus is surrounded by electrons that orbit.
Melissa ColliniHOST
... are gonna rotate around it.
Jam RobinsonHOST
That's what I was gonna say.