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15 Cards in this Set
- Front
- Back
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John Daltons theory was; All _______ is made up of tiny _______ called ________.
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matter, particles, atoms
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Atoms have a _____ in the center made up of three differnet ________ particles.
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nuclues, subatomic
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A submatomic particle with a postive charge found in the Nuclues.
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A proton
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A submatomic particle with no charge found in the nuclues.
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Nuetron
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a submatomic particle with a negative charge: Surronds the nuclues
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electron
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electrons circle the nuclues in a fixed orbit. Low energy electrons were thought to orbit close to the nucleus, and high energy electrons orbited further away from the nucleus.
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The Bohr Model
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electrons may occupy many positions around the nucleus in a spherical orbit.
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The Modern model
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Most of the mass of an atom is found in the
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nucleus
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Protons and neutrons have
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about the same mass
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Protons have ____ more mass than electrons.
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2,000 tomes
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Protons and electrons have different masses but they
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have strong charges
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The atThe attraction betweenpostive protons and negative electrons is
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what holds the atoms together
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Positive charges have
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more protons
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Negative Charge
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more electrons
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Nuetral charge
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Equal number of protons and electrons
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