1800--1875+st

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 * Dmitri Mendeleev, Born:1834 Died: 1907
 * Hails From: Tobolsk, Siberia
 * His most noticable accomplishments are for his work on the periodic table of elements. He single handedly configured sixty-three elements into a perodic table.
 * Mendeleev used atomic masses to group the elements into certain areas of the table. Realizing that some elements had similarities and put them together in a table.
 * His table did not include any of the noble gases. However, he was smart enought o realize that some elements have not been discovered yet so he left space for them on his table.
 * Dmitri did not stop with just the periodic table he also, studied fluid expansion and fasinated with petroleum.

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 * Sir William Crookes, Born: June 17th, 1832 Died: April 4th 1919
 * Hails From: London, England
 * His work on cathode rays led him to to discover that the rays travel in staright lines, cause glass to fluoresce, give off a negative charge to objects they strike, are unable to penetrate electric fields and magnets, contain mass, and with these findings he was able to construct the Crookes Tube.
 * This then led him to the brink of modern day television. He spent the rest of his days as superintendant of the meteorological department at Radcliffe Observatory in Oxford.
 * John Dalton, Born: December 6th, 1776 Died: Unknown
 * Hails From: Eaglesfield, England
 * Dalton's greatest achievement was the atomic theory.
 * His theory stated 1-all matter is made of atoms atoms are indivisible and indestructible
 * 2- All atoms of a given element are identical in mass and property
 * 3- Compunds are formd by two or more different kinds of atoms
 * 4- Chemical reactions is the rearrangement of atoms
 * Discovered theory in 1808
 * Dalton was born in to Quaker Family. upon turning 12 he becam a teacher and public lecturer of family