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| is a positively charged particle |
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| the combination of protons and neutrons of the atoms |
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| are negatively charged particles that move around outside the nucleus |
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Definition
| the identity of an atom is determined by the number of protons in its nucleus |
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| the total number of protons and neutrons in an atoms' nucleus |
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| are atoms of the same element that have a different number of neutrons |
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| is formed when an atom loses or gains one or more electrons |
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Definition
| the atoms of an element is the average mass of all the element's isotopes |
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Definition
| a table of all the elements |
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| each horizontal row in the periodic table |
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| how likely an element is to undergo a chemical change |
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| the elements to the right side of the periodic table |
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Definition
| are elements that have properties of both metals and nonmetals |
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Definition
| atoms that produce energy and particles |
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| the amount of time that it takes for one-half of the atom in a particular sample to decay |
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