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In 400 B.C. Democritus proposed the idea that matter was not infinitely divisible
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368 B.C.
Developed the scientific method -
In 3000 B.C. China ladies came up with the invention of nail polish. They used flower petals and alum to make nail polish.
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First Law of Conservation of Mass
-The total mass in a chemical reaction remains constant -
Law of Definite Porportion
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Cathode Ray: Led to discovery of television
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Came up with the Atomic Theory: All matter is composed of extremely small particles called atoms, different atoms combine in simpler whole number ratios to form compounds
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First to propose that a gaseous element, oxygen, hydrogen, and nitrogen are diatomic molecule
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The inventor was from Philidelphia, The inventor trademarked his invention
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Came to conclusion that the mass of the charged particles was much less then that of a hydrogen atom
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It was invented by James Naismith and it was played at Springfield College.
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It was invented by William G. Morgan
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Natural radioactivity
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Isolates pure radium for the first time
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Recognized significance of the theory of relativity
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Theory of Relativity, atomic bond
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Hair dye was invented by Eugene Schueller, the same guy who invented sunscreen
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Determined charge of an electron
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Concluded there was a nucleus and made a new nuclear atomic model
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Discovered that atoms of each element contain a positive charge in their nuclei
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Published his model of the atomic structure
-Introduced the theory of electrons -
Q-tips were invented by Leo Gerstenzang. He decided to make q-tips after he saw his wife wrap cotton on a toothpick.
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Electrons could behave as waves under some conditions
Helped scientists understand that the atom didn't behave like the solar system -
Quantom mechanics
-Radiation emitted by the atom -
Made an equation
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Showed the nucleus contained a neutron
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It was invented by Franz Greiter. It had an SPF of 2.
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The original McDonald's was founded in 1940. McDonald's didn't avcually open until 1955.
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It was developed from a resin-like substance that resembled shellac.
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It was founded by brothers, Dan and Frank Carney in their hometown Witchita, Kansas
