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15 Cards in this Set
- Front
- Back
Proton
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Positive charge particle
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Electron
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Negatively charged particle found outside the nucleus
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Neutron
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A 3rd kind of particle in an atom and inside the nucleus
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Atomic Number
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# of protons in the nucleus
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Atom
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The smallest piece of an element that has all properties
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Demetri Mendeleev
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One who created the Periodic Table
- 63 elements |
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Rutherford
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Said Positive part of an atom (nucleus)
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Bohr
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Said electrons did not zoom around the nucleus
-All energy levels are not the same distance apart |
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Thomson
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Atoms are made of small particles
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Dalton
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Said All matter is made up of invisible particles called atoms and they cant be split up, destroyed or created
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Democritus
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First person to make a a model of an atom
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Atomic Mass
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Most of the mass is in the Nuclues
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Schrodinger
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Found in more of a cloud rather than a path
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Energy levels
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The horizontal rows that are also called periods
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Chemical Symbol
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A way of using 1 or 2 letters that resemble the element
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