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Period: 100 to
Atomic Theory
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400
Democritus
DemocritusDemocritus lived from 460 BC to 370 BC. He was a Greek Philiosopher. He contributed the first Atomic Theory, which stated that everything is made from atoms. -
John Dalton
John DaltonJohn Dalton lived from 1766-1844. He proposed the Atomic Theory in 1803 "which stated that (1) all matter was composed of small indivisible particles termed atoms, (2) atoms of a given element possess unique characteristics and weight, and (3) three types of atoms exist: simple (elements), compound (simple molecules), and complex (complex molecules)" -
Ernest Rutherford
http://www.nobelprize.org/nobel_prizes/chemistry/laureates/1908/rutherford-bio.html he lived from 1871 to 1937. he studied radiation propertys and what he did. he was also knighted.became a langworthy profeser of physics. -
JJ Thomson
JJ Thomson JJ Thomson lived from 1856 to 1940. He contributed the discovery of the electron in 1897. He also created the chocolate chip cookie theory. -
Niels Bohr
http://www.biography.com/people/niels-bohr-21010897 he lived from 1885 to 1962. he found that electrons dont lose energy.bors theory was based on mathamatics.he won the nobel prize in 1922. -
James Chadwick
http://www.nobelprize.org/nobel_prizes/physics/laureates/1935/chadwick-facts.html lived from 1891 to 1974. he dicovered the nuetron. he was a nuclear phisisist. in 1932 he could show that in the reaction a neutral particle with a mass about that of a proton was emitted. -
Max Planck
http://www.nobelprize.org/nobel_prizes/physics/laureates/1918/planck-bio.html he lived from 1858 to 1947. he was marryed twice.
