Atom Timeline

1704 Isaac Newton Proposed a mechanical universe with small absolute raft in motion. 1803 John Dalton Proposed an atomic theory with orbiculate solid atoms based upon measurable properties of masses 1832 Michael Faraday Studied the do of electrical automobileity on solutions, coined term electrolysis as a ripping of molecules with electrical energy, developed laws of electrolysis. Faraday himself was non a proponent of atomism. 1859J. PluckerBuilt one of the first off gas discharge tubes (cathode re tube).1869Dmitri MendeleevArranged elements into 7 groups with interchangeable properties.  He observed that the properties of elements  were occasional(a) functions of the their atomic weights.  This became known as the episodic Law.1873James Clerk MaxwellProposed electric and charismatic fields filled the void.1879Sir William CrookesDiscovered cathode rays had the interest properties: travel in straight lines from the cathode; manage glass to fluo resce; impart a prohibit charge to objects they strike; are deflected by electric fields and magnets to suggest a negative charge; cause pinwheels in their path to spin indicating they get under ones skin mass.1886E. GoldsteinUsed a cathode-ray tube to study distribution channel rays which had electrical and magnetic properties opposite of an electron.1894G.J.

StoneyProposed that electricity was made of discrete negative particles he called electrons . (Link to info on electrons)1895Wilhelm RoentgenUsing a cathode-ray tube he discover that nearby chemicals glowed. promote experiments found very(prenominal) penetrating rays advance from the CRT that were not deflected by a magnetic field. He named them X-rays.1896Henri Becqu! erelWhile studying the effect of x-rays on photographic film, he discovered some chemicals ad lib decompose and give off very pentrating rays.1897J.J. ThomsonUsed a CRT to experimentally determine the charge to mass ratio (e/m) of an electron =1.759 x 10 8 coulombs/gram.1897J.J. ThomsonStudied canal rays and found they were associated with the proton H +...If you want to get a across-the-board essay, order it on our website: OrderEssay.net

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