Chemistry of Life (Lesson three)
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10 Terms
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Atoms
smallest, stable components of cells
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Element
Substance consisting of one type of atom with same number of protons
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Atomic Number
Number of protons in an atom
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Mass
amount of substance
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Weight
force exerted by gravity of a substance
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Atomic Mass
sum of masses of protons and neutrons in an atom
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Dalton
Unit of mass
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Valence Shell
outermost shell
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Anion
negative, more electrons than protons
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Cation
positive, more protons than electrons
Note 
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