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16 Cards in this Set
- Front
- Back
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Nucleus
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Center of the atom
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Electrons
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Negatively charged particles
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Protons
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Positively charged particles
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Subatomic particles
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particles smaller than the atom
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Neutrons
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Electrically neutral particles
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Atomic number
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the number of protons in the nuclues of the atom
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Isotopes
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Atoms of the same element that have the same number of protons and a different number of neutrons
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Mass number
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The sum of an atom's neutrons and protons
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Atomic mass
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Average mass of all the isotopes of a given element
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Electron cloud
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The entire space that the electrons occupy
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Energy levels
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The levels in which electrons lie
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Quarks
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Particles that make up protons and neutrons
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Electromagnetic force
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Attracts or repels particles
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Strong force
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Opposes electromagnetic force
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weak force
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Responsible for radioactive decay
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Gravity
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Downward force between alll objects and nature
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