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460 B.C.
– developed idea of atoms
–"if you bread matted in half, and then break it in half again, how many breaks will you have to make befor you can break it no more?" -
- thought the idea of atoms was worthless. influenced many people to think it was worthless because he had a great influence on societly.
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Christopher Columbas accidently discovered it while trying to reach India by proving the earth round.
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invented by Thomas Newcomen
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- first to make an extensive list of the elements.
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invented by William Jessup
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invented by John Fitch
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- invented the law of definate proportions and wrote a paper on it. the law was not accepted until 1811.
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-used chemicals to show that matter seemed to consist of elementry lumpy particals. knew the evidence pointed to something fundemental.
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- hypothisiszed now's avagado's law. V/n=k
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shot by john wilks booth
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-developed vaccume tube that allowed him to produce cathodode ray tubes with a smaller residual gas pressure. -cathodode rays were negitivly charged by studing deflection of cathode rays by magnetic fields.
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invented by Charles Edgar Duryea and his brother Frank
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- Discovered radio activity
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-discovered electron and proosed the "rasin in pudding" atom model.
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- discovered light eliminated heart from an object and invented the quantu therory.
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- shared in the diescovery of radio activity.
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by the Wright brothers.
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- emergy+mass * speed of light (squared) e=mc(squared)
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- with the oil drop expiriment found the unit charge of electron allowin gthe calculation of the mass of the electron and positively charged atoms.
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- bombarded atoms with alpha rays. found that the positive matter must exist in the middle. then set up a new model more like the solar system.
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- discovered each atom's neuculas had a unique electric charge.
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- made an approximation on the planetary model of the atom.
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- believed Bohr's model was incorrect and proved it so by using waves.
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- made mechanical model or quantum mechenical model of the atom used today.
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walt disney's "mickey mouse" took off.
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- stated with the uncertainty principal that it's impossible to know precicely both the velosity and the precision of a partical at the same time.
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us center of disease control discovered it in 5 homosexual men in LA.
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World Trdae centers attacked and collapsed
