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Definition
| the center of an atom; made up of protons and neutrons |
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Definition
| any of the possible energies an electron may have in an atom |
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Definition
| a region in an atom where this is a high probability of finding electrons |
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Definition
| an electron in the outermost energy level of an atom |
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Definition
| properties of elements tend to change in a regular pattern |
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Term
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Definition
| the process of adding electron to or removing electrons from an atom |
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Definition
| an ion with a positive charge |
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Definition
| an ion with a negative charge |
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Term
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Definition
| the number of protons in the nucleus of an atom |
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Definition
| any atoms having the same number of protons but different numbers of neutrons |
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Definition
| a quantity equal to one-twelfth of the mass of a carbon-12 atom |
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Definition
| the weighted average of the masses of all naturally occurring isotopes of an element |
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Definition
| the elements that are good conductors of heat and electricity |
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Term
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Definition
| the elements that are usually poor conductors of heat and electricity |
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Term
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Definition
| the elements that are intermediate conductors of heat and electricity |
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Term
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Definition
| the SI base unit that describes the amount of a substance |
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Definition
| the number of particles in 1 mole |
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Definition
| the mass in grams of 1 mole of a substance |
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Term
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Definition
| a ratio equal to one that expresses the same quantity in two different ways |
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