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460
Idea of an Atom
Democritus though of the idea of the atoms after wondering what the smallest form of matter was. However, Aristotle strongly disagreed. -
Period: 460 to
Journey of the Atom
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Dec 15, 1574
Giordano Bruno
He thought that god existed in atoms. -
Isaac Newton
He thought that atoms can move and are not stationary. -
John Dalton
John Dalton proposed that atoms have always existed and cannot be created or destroyed, everything is made from atoms, they are the smallest and cannot be broken apart, chemical reactions occur when atoms move and that atoms of the same element are alike because they have the same mass. He also had many more contributions -
Henri Becquerel
He founded radioactivity when he researched uranium and other subtances that were radioactive. -
J.J Thompson
He discovered the electron and made the plum-pudding model of the atom. -
Robert Milikan
He found out about the electric charge of electrons. -
Henry Moseley
He worked on many theories about the atomis number. He also organised many elements on the periodic table. -
Ernest Rutherford
His Geiger–Marsden experiment gave us information about the atomic structure, where the atom is a nucleus and electrons orbit around it. -
Neils Bohr
Neils Bohr discovered the revised structure of the atom. -
Louis de Broglie
He discovered that electrons are similar to both particals and waves. He also supported Einstein. -
Erwin Schrodinger
He came up with the schrodinger theory. -
Werner Heisenberg
He discovered the Heisenberg Uncertainty Principle. -
James Chadwick
He discovered the neutrally-charged neutron.