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Alchemy first fully began in the 17th century
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he theorized that all matter has atoms in them even though there technology was not good for that time line
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he was a Greek philosopher he founded the platonist school
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Aristotle was a Greek philosopher and polymath during the Classical period in Ancient Greece
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he thought that matter will nether create nor destroy
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he proposed that ever element is the same for example they weigh the same
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A British chemist named John Newlands attempted to combine the 62 elements known at the time in 1864. and then put them in order by there atomic mass
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he created the frame work for the first Pd table
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In connection with work on radio waves, Hertz observed that, when ultraviolet light shines on two metal electrodes with a voltage applied across them
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Henri Becquerel he is well know for the accidental discovers ever
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searched cathode rays for the carrier of the electrical properties in matter
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it was discovered by a English physicist named J.J. Thomas
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his theory tell us light bulb filaments should be heated to a temperature about 3200 Kelvin to have the most energy shown
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all of the experimental evidence about atoms in the simplest way possible
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Ernest Rutherford he named the discovery "proton" because of the Greek word "protons"
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if you bombarded very thin sheets of gold foil with fast moving alpha particles
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Niels Bohr had a theory for the hydrogen atom,
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he concluded that the atomic number is the number of positive charges
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He was awarded the Nobel Prize in Physics in the year 1935 for this discovery
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it is a liner particle differential equation that governs the wave function
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n February 1927, the young Werner developed a key piece of quantum theory, the uncertainty principle, with profound implications