Uploaded June 2025 | Updated September 2026, 2 weeks ago
Rutherford’s gold foil experiment revealed the nucleus and showed atoms are mostly empty space, an essential turning point in atomic structure. Rutherford aimed a ray of alpha particles at a thin gold foil and discovered that the atom is mostly empty space with a dense, positively-charged nucleus. Learn about his experiment & how drastically it changed our understanding of the structure of an atom.
Related Units:
If you're studying early atomic theory, watch the full playlist: youtube.com/playlist?list=PLvUW25kBaMMszGN5XY0QXNP_t-9Z-B8C2
If you want a strong foundation for studying chemistry, this playlist is your friend: youtube.com/playlist?list=PLvUW25kBaMMssGHFrR4Ee7_-8cFBvBkgN
If you're studying for the MCAT: youtube.com/playlist?list=PLvUW25kBaMMuJZI5IVWO8X0syBANn-YqY
🧪Support free education & more through Patreon! patreon.com/c/ChemistryinaNutshell
🔬As an Amazon Affiliate, I earn from qualifying purchases at no extra cost to you. Start your shopping here: amzn.to/3IXuAcS
0:00 Rutherford, Geiger, Marsden
0:14 Experimental Setup
1:09 Scale of the Alpha Particle
1:28 Competing Atomic Models
2:32 Results & Interpretations
4:01 Rutherford's Planetary Model of the Atom
Citations:
Paula Yurkanis Bruice, "Organic Chemistry" 8th ed
openstax.org/details/books/organic-chemistry
openstax.org/details/books/chemistry-2e
Images:
en.wikipedia.org/wiki/Rutherford_scattering_experiments#/media/File:Ernest_Rutherford2.jpg
upload.wikimedia.org/wikipedia/commons/a/ad/Hans_geiger.jpg
en.wikipedia.org/wiki/File:Ernest_Marsden_1921.jpg
en.wikipedia.org/wiki/BL_15-inch_Mk_I_naval_gun#/media/File:WW2_Singapore_15inch_shell.jpg
pixabay.com/photos/solar-system-sun-mercury-venus-439046
Periodic Table used with permission from sciencenotes.org/printable-periodic-table
Rutherford’s gold foil experiment revealed the nucleus and showed atoms are mostly empty space, an essential turning point in atomic structure. Rutherford aimed a ray of alpha particles at a thin gold foil and discovered that the atom is mostly empty space with a dense, positively-charged nucleus. Learn about his experiment & how drastically it changed our understanding of the structure of an atom.
Related Units:
If you're studying early atomic theory, watch the full playlist: youtube.com/playlist?list=PLvUW25kBaMMszGN5XY0QXNP_t-9Z-B8C2
If you want a strong foundation for studying chemistry, this playlist is your friend: youtube.com/playlist?list=PLvUW25kBaMMssGHFrR4Ee7_-8cFBvBkgN
If you're studying for the MCAT: youtube.com/playlist?list=PLvUW25kBaMMuJZI5IVWO8X0syBANn-YqY
🧪Support free education & more through Patreon! patreon.com/c/ChemistryinaNutshell
🔬As an Amazon Affiliate, I earn from qualifying purchases at no extra cost to you. Start your shopping here: amzn.to/3IXuAcS
0:00 Rutherford, Geiger, Marsden
0:14 Experimental Setup
1:09 Scale of the Alpha Particle
1:28 Competing Atomic Models
2:32 Results & Interpretations
4:01 Rutherford's Planetary Model of the Atom
Citations:
Paula Yurkanis Bruice, "Organic Chemistry" 8th ed
openstax.org/details/books/organic-chemistry
openstax.org/details/books/chemistry-2e
Images:
en.wikipedia.org/wiki/Rutherford_scattering_experiments#/media/File:Ernest_Rutherford2.jpg
upload.wikimedia.org/wikipedia/commons/a/ad/Hans_geiger.jpg
en.wikipedia.org/wiki/File:Ernest_Marsden_1921.jpg
en.wikipedia.org/wiki/BL_15-inch_Mk_I_naval_gun#/media/File:WW2_Singapore_15inch_shell.jpg
pixabay.com/photos/solar-system-sun-mercury-venus-439046
Periodic Table used with permission from sciencenotes.org/printable-periodic-table









![SN2 Trap: Why (R) Doesnt Always Invert to (S)
Think SN2 always inverts R/S configuration? Dont fall for the (R) to (R) trap on your midterm! If youve been taught the Golden Rule that SN2 must flip between R/S, this video is required viewing.
Were dissecting a textbook lie utilizing a 1970s breakthrough from the H.C. Brown lab. Ill show you exactly how an (R) reactant can produce an (R) product through a perfectly standard SN2 mechanism, WITHOUT breaking a single rule.
📘Master the Mechanisms! Grab the Organic Chemistry Reaction Mechanisms Survival Guide: https://payhip.com/b/rYbBp
🧠Full Mechanisms Playlist: https://www.youtube.com/playlist?list=PLvUW25kBaMMtvqt_IBtezyBX_kk447pxZ
🍵Buy the Professor a tea to keep the videos coming: https://www.patreon.com/c/ChemistryinaNutshell
🧬If you need a refresher on chirality for mechanisms to make sense, start here: https://www.youtube.com/playlist?list=PLvUW25kBaMMupOdw1Wgy8YauiQ40J_5nx
⚗️For all of my ochem videos in one place: https://www.youtube.com/playlist?list=PLvUW25kBaMMuKRkW9gDV7vlAk4Y9WRU7c
🥼If you need to take the MCAT: https://www.youtube.com/playlist?list=PLvUW25kBaMMuJZI5IVWO8X0syBANn-YqY
What youll master in this gotcha question breakdown:
• The CIP Trap: Why (R) to (R) isnt a mechanism failure, but a priority change.
• Super-Hydride Logic: Dissection lithium triethylborohydride (LiEt3BH) to see why its the surgical strike of nucleophiles.
• The Spatial Literacy Test: Using 3D molecular models to see the backside attack when the 2D drawings fail you.
0:00 The 5-Point SN2 Chirality Trap
0:23 Tiebreakers: Assigning Priorities to the Reactant
1:00 The Hand Rule: Confirming the (R) Configuration
1:26 Is Super-Hydride too bulky for SN2?
1:48 [SOURCE] Krishnamurthy & Brown Paper (1982)
2:08 3D Model Walkthrough: Geometry of the Nucleophile
2:54 The Mechanism: Concerted Backside Attack
3:55 The Umbrella Inversion vs. Configuration
4:30 Re-evaluating Priorities for the Product
4:56 The Hand Rule: Why the Product is (R)
5:10 The Verdict: Why (R) stayed (R)
5:23 Pro-Tip: How to assign R/S in seconds
📖The Research (Primary Source for LiEt3BH): Selective reductions. 31. Lithium triethylborohydride as an exceptionally powerful nucleophile. A new and remarkably rapid methodology for the hydrogenolysis of alkyl halides under mild conditions
S. Krishnamurthy and Herbert C. Brown
The Journal of Organic Chemistry 1983 48 (18), 3085-3091
DOI: 10.1021/jo00166a031
https://pubs.acs.org/doi/pdf/10.1021/jo00166a031
🥽As an Amazon Affiliate, I earn from qualifying purchases at no extra cost to you.
🥼My recommendations: https://www.amazon.com/shop/chemnut?ccs_id=11f20bce-5f74-427b-85fb-bdf66849405a
🔬Start any shopping journey here: https://amzn.to/3IXuAcS
Citations:
Paula Yurkanis Bruice, Organic Chemistry 8th ed
https://openstax.org/details/books/organic-chemistry
https://openstax.org/details/books/chemistry-2e
Music: https://youtu.be/lL6AsbG07xY SN2 Trap: Why (R) Doesnt Always Invert to (S)](https://i.ytimg.com/vi/IHSRGx_GlZA/mqdefault.jpg)
