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Chemistry

Atom

TermDefinition
Dalton Atomic Theory All matter is made up of indivisible atoms which cannot be created or destroyed
William Crooke discovered the Electron. Cathode ray tube.
Thompson Thomson determined that electrons were negative. Found E/M ratio
Robert Milikan Oil drop experiment discovered size of electron's charge.
Plum Pudding Model Solid positive sphere with electrons embedded
Rutherford Rutherford discovered the Nucleus. Fired alpha particles at gold foil. Proton.
Chadwick Chadwick discovered the neutron by firing alpha particles at beryllium.
Energy Level Energy level is the fixed energy value that an electron in an atom may have.
Heinsenberg Uncertainty Principle Heisenberg's Uncertainty Principle states that it is impossible to measure at the same time both the velocity and the position of an electron
Orbital is a region of space in which there is a high probability of finding an electron.
Created by: Eugene24
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