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How do we know molecules exist when we can't see them?
Brownian Motion
St. Mary's University in Nova Scotia, Canada
The Real Thing
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Brownian_motion.mov
III. Early Models of Atoms
A) Rutherford Model of Atom (1911)
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Listen to Rutherford talk about the atom
Model Based on Alpha Particle Scattering Experiment
Rutherford Experiment - www.CosmoLearning.com (onsite) Rutherford Experiment Molecular Expressions Alpha Particle Scattering St. Mary's Physics Online Rutherford shot alpha particles at a thin gold foil to learn about the atom Prentice Hall Onsite Alpha particle Thin gold foil What explains their curved path?? Repulsive electrical force (A.K.A. coulomb force) Unexpected: Large deflection angles Indicates strong forces Rutherford Scattering Applet - © 1995-2007 by Michael W. Davidson and Florida State University Rutherford Scattering Michael Fowler Conclusions: 1) Most of the volume of the atom is ... The_Space_Between_Atoms.mp4 The_Space_Between_Atoms.mov empty space (nucleus 1 x 10-15 m) Did you know ... A neutron star is created when a massive star runs out of fuel and collapses. This tremendous gravitational collapse squeezes all the empty space out of the atom. Electrons merge with protons and create neutrons. The density of a neutron is so enormous that a teaspoon of a neutron star would weigh 20 billion pounds!!! - Cornell Astronomy http://www.astro.cornell.edu/academics/courses/astro201/neutron_star.htm Did you know ... If the atom were the size of a football stadium, the nucleus would be the size of a.... .... a marble!!! - Encyclop. of Science That's why most alpha particles go straight through!!! 2) Virtually all mass atom found in ... ... the nucleus 3) Strong, positive charge in the center of atom That's why positive alpha particles were curved so strongly "Other Side of Infinity" Movie Trailer Relative Sizes in the Atom St. Mary's H.S. Physics Hear Thomson talk the Electron Bohr Model of Atom ©Tony Mangiacapre., - All Rights Reserved [Home] Established 1995 Use any material on this site (w/ attribution)
Rutherford Experiment - www.CosmoLearning.com
(onsite)
Rutherford Experiment Molecular Expressions
Alpha Particle Scattering St. Mary's Physics Online
Rutherford shot alpha particles at a thin gold foil to learn about the atom
Prentice Hall Onsite
Alpha particle
What explains their curved path??
Repulsive electrical force (A.K.A. coulomb force)
Unexpected:
Large deflection angles
Indicates strong forces
Rutherford Scattering Applet - © 1995-2007 by Michael W. Davidson and Florida State University
Rutherford Scattering Michael Fowler
Conclusions:
1) Most of the volume of the atom is ...
The_Space_Between_Atoms.mp4
The_Space_Between_Atoms.mov
empty space
(nucleus 1 x 10-15 m)
Did you know ...
A neutron star is created when a massive star runs out of fuel and collapses. This tremendous gravitational collapse squeezes all the empty space out of the atom. Electrons merge with protons and create neutrons.
The density of a neutron is so enormous that a teaspoon of a neutron star would weigh 20 billion pounds!!!
- Cornell Astronomy
http://www.astro.cornell.edu/academics/courses/astro201/neutron_star.htm
Did you know ... If the atom were the size of a football stadium, the nucleus would be the size of a....
.... a marble!!!
- Encyclop. of Science
That's why most alpha particles go straight through!!!
2) Virtually all mass atom found in ...
... the nucleus
3) Strong, positive charge in the center of atom
"Other Side of Infinity" Movie Trailer
Relative Sizes in the Atom
St. Mary's H.S. Physics
Hear Thomson talk the Electron
Bohr Model of Atom
©Tony Mangiacapre., - All Rights Reserved [Home] Established 1995 Use any material on this site (w/ attribution)
