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Definition
| the smallest particle that can still be considered an element |
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Definition
| negatively charged particles in an atom |
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Term
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Definition
| the central core of an atom containing protons and neutrons |
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Term
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Definition
| positively charged particles in an atom |
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Term
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Definition
| the specific amount of energy an electron has |
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Term
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Definition
| a particle in an atom that has no 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
| Atoms with the same number of protons and different numbers of neutrons |
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Term
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Definition
| the sum of the protons and neutrons in an atom |
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Term
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Definition
| the average mass of all the isotopes of that element |
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Term
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Definition
| an arrangement of elements showing the repeating patterns of their properties |
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Term
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Definition
| contain one or two letters that represent an element |
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Definition
| rows on the periodic table |
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Term
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Definition
| columns on the periodic table |
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Term
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Definition
| elements that are good conductors of heat and electricity |
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Term
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Definition
| describes how shiny and reflective a metal is |
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Term
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Definition
| a characteristic that allows a material to be hammered or rolled into flat sheets or other shapes |
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Definition
| a characteristic that allows a material to be pulled out, or drawn into long wires |
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Definition
| the ability of an object to transfer heat |
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Definition
| the ability of an object to carry electric current |
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Term
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Definition
| the ease and speed with which an element combines, or reacts, with other substances |
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Definition
| the deterioration of a metal due to a chemical reaction in the environment |
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Definition
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Definition
| an element in groups 3-12 |
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Term
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Definition
| an element that lacks most of the properties of a metal |
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Term
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Definition
| a molecule made of two atoms |
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Definition
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Definition
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Term
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Definition
| have some properties of metals and some properties of nonmetals |
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Term
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Definition
| substances that can conduct electric current under some conditions but not others |
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Term
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Definition
| the atomic nuclei of radioactive isotopes release fast moving particles and energy |
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Term
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Definition
| involve the particles in the nucleus of the atom |
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Term
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Definition
| an element being able to spontaneously emit radiation |
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Term
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Definition
| consists of two protons and two nuetrons |
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Term
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Definition
| a fast moving electron given off by a nucleus during radioactive decay |
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Term
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Definition
| consist of high energy waves |
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Term
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Definition
| the length of time needed for half the atoms of a radioactive isotope to decay |
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Term
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Definition
| scientists use this technique to calculate how many half-lives have passes since a plant died and estimate the age of the fossil |
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Term
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Definition
| radioactive isotopes that can be followed through the steps of a chemical reaction or an industrial process |
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