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Scientific History

In: Science

Submitted By kaitlyn249
Words 854
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Greek era |Democritus |"by convention bitter, by convention sweet, but in reality atoms and void" | |
|1704 |Isaac Newton |Proposed a mechanical universe with small solid masses in motion. |
|1803 |John Dalton |Proposed an "atomic theory" with spherical solid atoms based upon measurable properties of mass. |
|1832 |Michael Faraday |Studied the effect of electricity on solutions, coined term "electrolysis" as a splitting of molecules with electricity, |
| | |developed laws of electrolysis. Faraday himself was not a proponent of atomism. |
|1859 |J. Plucker |Built one of the first gas discharge tubes ("cathode ray tube"). |
|1869 |Dmitri Mendeleev |Arranged elements into 7 groups with similar properties. He discovered that the properties of elements "were periodic |
| | |functions of the their atomic weights". This became known as the Periodic Law. |
|1873 |James Clerk Maxwell |Proposed electric and magnetic fields filled the void. |
|1879 |Sir William Crookes |Discovered cathode rays had the following properties: travel in straight lines from the cathode; cause glass to fluoresce; |
| | |impart a negative 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…...

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