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16 Cards in this Set
- Front
- Back
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atom
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the smallest particle of an element that retains the specific properties of that element
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atomic number
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the number of protons in the nucleus
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mass number
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the mass of the atom (protons + neutrons)
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neutrons
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mass # - atomic #
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neutral atom
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an element where # of protons = # of electrons
* assume any element on the periodic table is a ____________ _______ |
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ion
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an element that has gained or lost an electron to get a + or - charge
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cation
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+ charge -----> lose electrons
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anion
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- charge -----> gain electrons
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isotopes
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elements with the same atomic number (same protons) but different masses, due to a different number of neutrons
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mole
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SI unit for amound of substance
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molar mass
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mass of one mole
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Avogradro's number
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6.02x10(to the 23) power
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protons and neutrons
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an atoms nucleus contains ___________ and _________
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alpha
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it is a particle with 2 protons and 2 neutrons bound together making it basically a Helium nucleus
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beta
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oarticles with high-energy electrons or positrons
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gamma
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not a particle, but a radiation with high-energy photons
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