+
Related Flashcards
Cards In This Set
| Front | Back |
|
What did Democritus discover and what were his beliefs about it?
|
He discovered the atom and he believed that it was indivisible and indestructable.
|
|
How did Sir Isaac Newton contribute to the theory?
|
Proposed a mechanical universe with small solid masses in motion.
|
|
How did John Dalton contriubute to the theory?
|
Transformed Democritus' ideas into scientific theory
|
|
What did Mendeleev contribute that greatly helped us?
|
The periodic table
|
|
What did Goldstein do?
|
Discovered evidence of protons when rays traveled opposite of cathode rays
|
|
What did JJ Thompson do?
|
Discovered electrons using a cathode ray which disproved Democritus' theory that atoms were indivisible
|
|
What did Marie Curie do?
|
She studied uranium and thorium and she and her husband Pierre discovered polonium and radium
|
|
What did Einstein do?
|
Published the famous equation E=mc2
|
|
What did Milikan do?
|
Said that electrons have mass
|
|
What did Rutherford do?
|
Shot a particle emitter through gold foil
|
|
What did Bohr do?
|
Developed an explanation of atomic
structure that underlies regularities of the periodic table of elements. His
atomic model had atoms built up of successive orbital shells of electrons.
|
|
What did Werner Heisnberg do?
|
Proposed principle of indeterminancy: you cannot know both the position and velocity of a particle.
|
|
What did Schrodinger do?
|
Introduced wave mechanics as a mathematical model of the atom.
|
|
What did Chadwick do?
|
Discovered the neutron
|
