Ancient Philosophy/ Alchemists/
Particle Theory
Electron Discovery,Enter Category Charge, and Mass
Atomic Structure 1 and 2
Electron Models
Birth of Quantum Mechanics
100
Believed in 4 elements.
What is Aristotle?
100
Negatively charged particles in an atom.
What are electrons?
100
Discovered atom's were mostly empty space but dense core.
What is Earnest Rutherford?
100
Stated electrons traveled around the nucleus in random orbits.
What is the Electron cloud model?
100
"Father" of quantum mechanics.
What is Werner Heizenberg?
200
First believed matter was made of small particles called "atoms".
What is Democritus?
200
Year electrons were discovered.
What is 1897?
200
Scientist who proposed atoms traveled in an unfixed path.
What is Neils Bohr?
200
Year electron cloud model was created
What is 1926?
200
This happened in Germany in 1925
What is the start of the study of quantum mechanics.
300
Described each atom as a small particle that cannot be divided.
What is John Dalton?
300
Location where oil-drop experiment took place.
What is United States of America?
300
This experiment isolated positive particles in an atom.
What is the gold foil experiment?
300
Scientist who developed the electron cloud model.
What is Erwin Schrodinger?
300
Physical phenomena at microscopic scales.
What is quantum mechanics?
400
To change ordinary materials into gold.
What is alchemists reasoning to work on what became modern chemistry?
400
Discovered electrons were smaller particles of an atom.
What is J. J. Thompson?
400
Time-frame and location of where the atomic structure was mainly discovered at.
What is England, 1911-1913
400
Reason electrons appear to form a cloud around the nucleus.
What is the result of electrons traveling fast?
400
Trying to predict non-observable variables.
What is reason Bohr's model failed?
500
Building on the ideas of Democritus in ancient Greece.
What is Dalton's reasoning to take part in the study of chemistry?
500
Name of experiment used to find quantity of electron charge.
What is Robert A. Millikan's oil-drop experiment?
500
To show why negative electrons were not sucked into the nucleus of an atom.
What is the reason Bohr made his electron model?
500
Erwin Schrodinger's studies lead to this.
What is quantum mechanical model?
500
Non-Observable variables in Bohr's model.
What is position and speed?
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