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Cards In This Set
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Chemistry
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Study of nature and behavior of matter
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Atom
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Basic building block of matter
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Atom compositions
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Subatomic particles composed of protons, neutrons, and electrons
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The core of the atom?
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Nucleus: contains proton and neutrons
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Outside of the nucleus
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Electronselectrons can be found at the orbitals
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Element
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-all atoms of an element show similar chemical properties and cannot be further broken down by chemical means
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Subatomic particles: proton
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Proton (+); mass is 1amu (atomic mass unit)
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Atomic number
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Znumber of protons
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Neutrons
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No charge, mass is slightly larger than protons
-different isotopes of one element: have different number of neutrons but same protons |
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Mass number of an atom
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Total number of protons and neutrons
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A XZ
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Mass number--> Aatomic number--> Z
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Electrons
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-charge w/ same magnitude as proton but different in direction
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Valence Electrons
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-electrons farthest from the nucleus-the further away the valence electrons from the nucleus; the more unstable the valence electrons
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Neutral Atom
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Protons = electrons
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Ion
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-positive or negative charge on an atom due to a loss or gain of electrons
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