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(1766-1844)
All matter is composed of extremely small particles called atoms
Atoms cannot be created, divided into smaller particels, or destroyed
In a chemical reaction, atoms are separated, combined, or rearranged -
Easier way to drive around places and stopped using horses. Could get to farther places. Haul grain
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He compiled a list of elements known at the time. The list contained 23 elements.
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He created elements from water. and he did definite proportions.
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he determined the volume of one mole of a gas.
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did a series of experiments with cathode ray tubes to determine the ratio of its charge to its mass. Thomson was able to determine the charge to mass ratio. The conclusion was shocking becasue they found out that there were atoms smaller then hydrogen.
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His death came after the most important battle in the U.S. And after his famous speech.
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The first ones used were steam powered and used on farms.
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He helped with the discovery of radioactivity.
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First Case TractorThat year they came out with a new threshing machine and their first gasoline powered tractor.
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He figured out matter can gain or lose energy only in small, specific amounts called Quanta.
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(460-370 B.C.)
Matter is composed of empty space through which atoms move
Atoms are solid. homogenous, indestructible, and indivisilble
Different kinds of atoms have different sizes and shapes -
(384-322 B.C.)
One of the most influential philosophers
most of his writings have been lost through the ages -
He came up with the cathode ray fromradiation in a tube. These are used in televisions and computers.
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He determined the charge of an electron. So good was his experiment that he was within 1% of the current value. He calculated the mass of the electron.
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He studied how positiely cahrges particles interacted with solid matter. He conducted an experiment to see if alpha particles would be deflected as they passed through a thin foil of gold.
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He came up with the atomic number which is the same amount of protons are in the atom.
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Proposed a Quantum model for hydrogen atom. He proposed that the hydrogen atom has only certain allowable energy states.
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He proposed an idea that accounted for the fixed energy levels of Bohr's model. he proposed that can particles matter including electrons behave like waves.
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concluded that it is impossible to make any measurment on an object without distrurbing the object at least a little.
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Schrodinger derived an equation that treated the hydrogen atom's electron as a wave. It seemed to apply equally well to other atoms.
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He showed that the nucleus also contained another subatomic particle, a neutral particle called the neutron.
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First snowmobileA new vehicle to get around in the snow with very useful.
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He came up with the general idea of relatively. He laid the foundation the photon theory of light.
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She helped with radiactivty. Techniques for isolating radioactive iosotops. She also discovered 2 elements polonium and radium.
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Assassination Bad time in America.
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First Polaris SnowmobilePolaris joined the race of snowmobiles are started with a bang and is one of the premier leaders of today.
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Death of Martin luther King jr. Famous African American Rights leader. Pretty much gave blacks freedom.
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He was in the famous Beatles Band.
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One of the biggest deaths in U.S. They went in and raided him and it was a covert operation.
