Chemistry - Chemical patterns

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14 Terms

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protons

same as the atomic number

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electrons

same as the atomic number

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neutrons

mass number minus atomic number

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mass number

number of protons and neutrons combined

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ammonium

NH4+

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carbonate

CO3 2-

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hydroxide

OH-

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nitrate

NO3-

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Sulfate

SO4 2-

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mass number (meaning)

a number that expresses the approximate mass or an atom

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isotope

atoms with the same number of protons but different number of neutrons

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atomic number (meaning)

the number of protons in a nucleus

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<p>ground state</p>

ground state

the state of lowest energy for that electron

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<p>excited state</p>

excited state

when an electron temporarily occupies an energy state greater than its ground state