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(B.C) "Nothing can change into somebthing absolutely different" He first came up with the word "atom" and that they had masses. No atom could be identical and all of them had different shapes and sizes.
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(B.C) Roman Empire Fell
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Proposed a mechanical universe with small solid masses in motion.
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North Carolina seperates from South Carolina and gains its own Govenor
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discovered the law of partial pressures, and the law of stoichiometry. he had the first opinion that atoms of different elements had different masses, which then liad the foundation of the modern study of atoms.
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He provided the formula for the conservation of matter in chemical reactions, and also distinguished between an element and a compound.
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Proust proposed the law of constant composition, which states that a compound always has the same element in the proportion by mass.
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D.C. becomes U.S capital
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He was the Father of electrons and discovered isotopes as well but also invented the Mass Spectrometer.
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Continental Railroad was finished in Utah
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He discovered x-rays while experimenting with cathode-ray tubes.
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He was one of the first scientists to describe radiation with x-rays and uranium and than while studying the effect of x-rays on photographic Film he discovered some chemicals spontaneously decomposing and giveing off very pentrating rays.
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Known as one of the Founders of the Quantum Theory and developed it into a universal constant (known as Planck's Constant) where E=f*h and where h= 6.63*10E-34 Js.
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He is the father of Quantum Mechanics but also can up with the Schrodinger eqation for Phisics.
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He determined the atomic stru cture of electricity by accurately determining that electrons were negatively charged and that the charge was consistant for all electrons.
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Rutherford discovered a central positive nucleus that was surrounded by negatively charged electrons that were orbiting the nucleus. His model suggested that most5 of the mass was contained in the nucleus and the rest of the area surrounding it was mostyly empty space.
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Women were given the right to vote in the U.S
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Brogile showed that every object is associated with a wave and he found that small electrons where easiestly observably associated with waves.
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Made major contributions to Quantun Mechanics and asserted the uncertainty principle of Quantum Theory.
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Proved the Atomic nucleus contained a neutral particle, discovering the neutron,
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Synthesized 6 transuranium elements and suggested a change in the layout of the periodic table
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Martin Luther King made his speech "I have a Dream"
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Bohr model of the atom, theory that electrons travel in orbits around the nucleus of an atom.
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(B.C) Considered that there where four basic characteristics to a substance: Wettness, dryness, heat, and cold. He stated that the world couldn't be made of invisible particles becuase gravity would pull them down.
