De Broglie Wavelength Problems In Chemistry

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This chemistry video tutorial explains how to calculate the de broglie wavelength of large objects and small particles such as electrons. It contains plenty of examples and practice problems.

Speed of Light, Frequency, Wavelength:

Photon Energy:

The Photoelectric Effect:

De Broglie Wavelength:

The Bohr Model of Hydrogen:

Heisenberg's Uncertainty Principle:

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Intro to Quantum Numbers:

Orbitals & Atomic Energy Levels:

Maximum Number of Electrons:

Intro to Electron Configuration:

Electron Configuration Exceptions:

Noble Gas Notation:

Electron Configuration of Ions:

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Orbital Diagrams:

Paired & Unpaired Electrons:

Aufbau's Principle & Hund's Rule:

Paramagnetic & Diamagnetic Elements:

Valence Electrons & Periodic Table:

Effective Nuclear Charge:

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Slater's Rule:

How To Identify The Element:

Quantum Numbers - Mega Review:

Quantum Numbers - Practice Test:

Final Exams and Video Playlists:

Full-Length Videos and Worksheets:
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for anyone wondering how to get it in meters: 6.626E-34 J*s is equivalent to 6.626E-34 kgm^2/s, which should cancel out units and leave you with meters

randommeep
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may I give some advice. Great video first off but I suggest that you write the units for all the values too make it easier to explain.

yasseridris
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I would like to see the units because I do not understand how they cancel out.

kaileeguthrie
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Remember PEMDAS people, parentheses goes first, then divide. 👍

Doktah_Zari
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General Rule of Thumb:

C = wavelength x frequency (v)

Energy = h (planks constant) x frequency = h x c / wavelength

Da Broglie’s:
Wavelength = h/p = h/mass x velocity

manchesterfan
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I'd love to see the units and they cancel each other and convert to end up with our final units. The main reason I came to watch the video was to see the units worked out because I don't know what to do with the kg.

edgarfranco
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you need to use the fact that

1J= 1kg m^2/s^-2
to write Planck's constant as

h = 6.626x10^-34 kg m^2/s^2 * s
cancel both "s" it will be
h = 6.626x10^-34 kg m^2/s

royndrosario
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is anyone else getting completely different answers when plugged in??

alewavey
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Professor Organic Chemistry Tutor, thank you for showing How to use Broglie Equation in AP/General Chemistry. The problems and examples are simple to follow and understand using the classical De Broglie Equation. De Broglie Equation is another great contribution to Modern Chemistry. This is an error free video/lecture on YouTube TV with the Organic Chemistry Tutor.

georgesadler
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bro you never did a video on schrodingers wave equation and i was depending on you

barrymuindi
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I'm learning this in modern physics, I wonder if there is any difference between how its taught in chemistry and physics.

KY-xzyb
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Me here watching the night before my first chem 105 test, The Organic Chem Tutor always comes in clutch

travisfarmer
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ur videos are perfect; i am gonna have more than good grades cuz of u

bamlaktadesse
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we love you the organic chemistry tutor

razasyed
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What if the ball is moving very very slow then the wavelength of the ball will increase. So if a ball moves really slow can it go through the wall if its wavelength becomes longer than thickness of the wall??

Roust
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For the first problem, why is it m and not m^2?

lizang
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I have a question for you. In <lambda>=h/mv if v=0 the relation in meaningless. But I could have a speed low enough to have the object have a visible light wavelenght. For instance, if I weight 70 kg and I move at 1.4 x 10(-29) m/s my wavelenght would be (circa) 663 nm. Does it make sense?

ascaniosobrero
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I love you man, your channel has helped me so much ahhhh

arabellajennings
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What if an electron moving at 1/10 the speed of light ?

fidelshog-oy
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Quick question, why dont you use f (small letter) for the frequency, would make things less complicated i think with the wohle v and v thing right? Or not?

Perzior