Term
Name: JJ Thomson
Date of Discovery: 1987 |
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Definition
Discovery: Electrons
Experiment: Involved passing electric current through gases at low pressure |
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Term
Name: E. Rutherford
Date of Discovery: 1911 |
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Definition
Discovery: Nucleus
Experiment: Directed a narrow beam of alpha particles at a very thin sheet of gold file |
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Term
Name: E. Goldstein
Date of Discovery: 1886 |
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Definition
Discovery: Protons
Experiment: observed a cathode-ray tube and found rays traveling in the direction opposite to that of the cathode rays |
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Term
Name: J. Dalton
Date of Discovery: |
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Definition
| Discovery: Atomic Theory Experiment: Studied the ratios in which elements combine in chemical reactions Four Theories: 1. Atoms are composed of indivisible atoms. 2.Atoms of the same element are identical. 3. Atoms of different elements can mix together in a simple whole # ratios 4. Chemical reactions occur when atoms seperate or combine |
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Term
Name: Democritus
Date of Discovery: fourth century B.C. |
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Definition
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Term
Name: N. Bohr
Date of Discovery: 1940 |
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Definition
| Discovery: modern concept of the atomic model |
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Term
Name: J. Chadwick
Date of Discovery: 1932 |
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Definition
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Term
Name: R. Millikan
Date of Discovery: |
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Definition
Discovery: The quantity of charge carried by an electron and the ratio of the charge to the mass of an electron
Ecperiment: |
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Term
Name: E. Schroedinger
Date of Discovery: 1933 |
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Definition
| Discovery: new productive forms of atomic theory |
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Term
Name: D. Mendeleev
Date of Discovery: mid-1800s |
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Definition
| Discovery: Period Table of Elements |
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Term
Name: H. Moseley
Date of Discovery: 1913 |
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Definition
| Discovery: Atomic number of the atoms of the elements |
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