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Democritus
Deomcritus
Democritus lived from 460 BC to 370 BC. He was a greek philosopher. He noted that all matter is made from atoms, and that atoms could be combined with other atoms. -
Period: to
John Dalton's Life Span
http://www.nndb.com/people/278/000049131/
John Dalton lived 78 years and accomplished many things in his lifetime. -
John Dalton
http://www.johndalton.org/
Dalton believed atoms could neither be created nor destroyed. He also thought all matter is made of atoms. -
Max Planc
Website
Planck was born in Kiel, Germany in 1858. He died on October 4, 1947. He can is famously known for ussing the idea of quanta. -
JJ Thomson
JJ Thomson found that there was a positve and negative portion of atoms. He prosoposed the model similar to the chocolate chip cookie model. -
Ernest Rutherford
Website
Ernest Rutherford was known to be the father of nuclear physics. Rutherford discovered the concept of the radioactive half life. -
Niels Bohr
He founded the discoveries of the electron and radioactivity. He also found that the atom had a miniature, dense nucleus. -
Francis Aston
WebsiteAston was born September 1, 1877 – November 20, 1945. He found that isotopes, which are tiny particular chemical element in protons. -
Erwin Schrondinger
Born on August 12, 1887 and died on January 4, 1961. He is qknown mostly for creating the uantum mechanical model of the atom -
Louis de Brogile
He was born Aug 15, 1892 and died on Mar 19, 1987. He proposed in 1924 that electrons could behave as waves under some conditions. -
Paul Dirac
He was bornr on August 8, 1902 and died on October 20. He is most famous for helping develop the quantum electrodynamics. -
James Chadwick
Website
He established that atomic number is determined by the numbers of protons in an atom. He also discovered the fourth subatomic particle,the neutron. -
Werner Heisnenburg
He was born on Dec 5, 1901 and died on Feb 1, 1976. His main contribution was winning the 1932 Nobel Peace Prize for the contribution the theory of quatium.
