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10 Cards in this Set
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atomic number
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number of protons
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mass number
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number of protons plus number of neutrons
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ion
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an atom that has lost of gained electrons
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atomic weight
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the weight in grams of one mole (mol) of a given element and is expressed in terms of g/mol
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atomic mass unit (amu)
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one amu is defined as exactly 1/12 the mass of the carbon-12 atom
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Avogadro's number
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6.022 x 10^23 particles
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isotope
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for a given element, multiple species of atoms with the same number of protons (same atomic #) but different number of neutrons (different mass #) exist
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quantum theory
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energy emitted as electromagnetic radiation from matter comes in discrete bundles called quanta
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atomic emission spectrum
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each element can have its electrons excited to different distinct energy levels which can be used as a fingerprint for the element
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principle quantum number
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denoted by the letter n
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