History Of The Atom
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History of the Atom
History of the Atom • Democritus • 5th Century B.C • All matter is made of particles that can no longer be divided – Atom
History of the atom • • • •
1803 John Dalton Billiard Ball model Said the atom is a small solid sphere
History of the Atom • • • •
1897 Thomson Plum Pudding Model The atom has positive and negative parts
History of the Atom • • • •
1908-1913 Rutherford/Bohr Solar system Model The atom is mostly empty space with a dense positively charged center surrounded by negative electrons
Rutherford/Bohr Model
Electrons orbit a central point
History of the Atom • 1920+ • Schrodinger and Heisenberg • Atoms have a dense center made of protons and neutrons surrounded by electrons in a cloud
History of the Atom • Democritus • 5th Century B.C • All matter is made of particles that can no longer be divided – Atom
History of the atom • • • •
1803 John Dalton Billiard Ball model Said the atom is a small solid sphere
History of the Atom • • • •
1897 Thomson Plum Pudding Model The atom has positive and negative parts
History of the Atom • • • •
1908-1913 Rutherford/Bohr Solar system Model The atom is mostly empty space with a dense positively charged center surrounded by negative electrons
Rutherford/Bohr Model
Electrons orbit a central point
History of the Atom • 1920+ • Schrodinger and Heisenberg • Atoms have a dense center made of protons and neutrons surrounded by electrons in a cloud
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