The Founder of The Atomic Theory

                                   Website Title: Wikipedia                                 

  •                                    Article Title: John Dalton                                
  •                                    Publisher: Wikimedia Foundation                                
  •                                    Electronically Published: November 10, 2014                                
  •                                    Date Accessed: October 11, 2014
  • -John Dalton was born on (approx.) Sept. 5th, 7166 in Eaglesfield, England. His Quaker parents didn't officially register his date of birth, so the exact is unknown.

    -He studied meteorology/color-blindness.

    -At age 15 (at a Quaker school in Kendal) he became an assistant and at age 19 was appointed principal and held that position until he was 27.

    -His first scientific paper he ever wrote was read to the Literary and Philosophical Society of Manchester on October 31, 1794; it was written over colorblindness, something both he and his brother suffered from. Colorblindness is sometimes referred to as Daltonism because of his fascination with it.

    -He died 170 years before I was born. (Erika)

    The atoms that John had imagined mind were tiny, indivisible particles that made up all chemical elements. "If you could imagine looking at a piece of gold, for example, with the very highest magnification imaginable, what you would see is a collection of gold atoms. Similarly, an examination of a piece of copper under maximum magnification would reveal a collection of copper atoms."

    Which means that all these atoms looked the same unless they were of a different element. For example every gold atom would look the same, but gold and iron atoms looked different. He was also the first person to show that atoms had weight that could be experimented/tested with by showing their ratios. "A fixed weight of hydrogen will consume eight times its weight in oxygen to form water. It followed that each atom of oxygen must weigh eight times as much as each atom of hydrogen. Dalton's discussion of atomic weights gave chemists a concrete plan for exploring at least this aspect of the atomic theory. Within a few years, Dalton had prepared a list of atomic weights for the known elements. One reason for its rapid success was that it explained certain experimental results that had recently been announced, most notably Joseph Proust's law of constant composition which stated that a chemical compound always contains the same constituents in the same proportions." He established this discovery in 1803.

    Citations:------------------------------------------------------------------------------------------------

    "John Dalton." World of Physics. Gale, 2006. Science In Context. Web. 13 Oct.

    2014.Document URL http://go.galegroup.com/ps/i.do?id=GALE%7CK2434100...

    "Subatomic particles." World of Chemistry. Gale, 2000. Science In Context. Web. 12 Oct.

    2014.Document URL http://go.galegroup.com/ps/i.do?id=GALE%7CCV24325...

    http://go.galegroup.com/ps/retrieve.dosgHitCountType=None&sort=RELEVANCE&inPS=

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    • Website Title: Wikipedia
    • Article Title: John Dalton
    • Publisher: Wikimedia Foundation
    • Electronically Published: November 10, 2014
    • Date Accessed: October 11, 2014

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