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Aristotle
Developed a theory that matter consisted of water, fire, earth and fire. He thought that no matter how many times you cut a form of matter in half, you would always have a smaller piece of that matter. (The date was very long ago around 315 BC and too old to put on the timeline. Thats why the date is 1800) -
Joseph Proust
Found that hygrogen is the lightest element. Thought that everything. He found that its mass number equiled one. -
Ernest Rutherford
He discovered alpha particles. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6… -
Robert Millikan
He determined the charge of an element. -
Ernest Rutherford
Proved the wave structure of gamma radiation. -
Ernest Rutherford
Published work with Frederic Soddy. Won a Nobel Prize. -
Robert Millikan
Won Nobel Prize. -
Louis de Broglie
This is when he discovered the formula that is for the wave length of an electron moving. -
Louis de Broglie
He suggested that there is a wave connected with the moving of an electron. The formula is the picture. -
Werner Heisenberg
He created a theory called the matrix mechanics, another form of quantum mechanics. This is the modern atomic theory. -
Max Planck
Made discovery of x-rays. The formula for this is .5x10^-8. He worked with Albert Einstein.
