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final 1
| Term | Definition |
|---|---|
| matter | anything that has mass and takes up space |
| element | substance that can't be broken down by chemical or physical means |
| atom | smallest particle of element |
| molecule | particle made up of 2 or more atoms |
| compound | substance made of 2 or more elements |
| mixture | 2 or more substances that are mixed but not chemically combined |
| electron | negatively charged particles |
| proton | positively charged particles |
| neutron | nuetrally charged particle |
| nucleus | center core of an atom |
| valence electron | number of electrons in valence shell |
| chemical bond | attraction that holds 2 atoms together |
| chemical symbol | used to identify an element |
| atomic number | number of protons in nucleus of an atom |
| period | elements in same horizontal row of PT |
| Group/Family | elements in same column of PT |
| ion | atoms that have become electrically charged |
| ionic bonds | attraction between oppositely charged ions |
| chemical formula | combo of symbols that represents elements in a compound |
| subscript | number in chemical formula that tells the number of atoms in a molecule or a ratio of elements in a compound |
| covalent bond | chemical bond formed when 2 atoms share electrons |
| polar bond | covalent bond in which electrons are shared unequally |
| alloy | a material that is made up of 2 or more elements and has the properties of a metal |
| ductile | term used to describe a metal that can be pulled into a wire |
| malleable | term used to described a material that can be hammered or rolled into shape |
| physical property | characteristic of a substance that can be observed without changing it into another substance |
| chemical property | characteristic that describes its ability to change |
| physical change | alters form or appearance |
| chemical reactions | process in which substances undergo changes that result in formation of a new substance |
| endothermic reaction | absorbs energy in the form of heat |
| exothermic reaction | releases energy in the form of heat |
| chemical equation | easy way to show a chemical reaction |
| reactant | a substance that enters into a chemical reaction |
| product | substance formed as a result as a result of a chemical reaction |
| conservation of mass | matter can't be created or destroyed |
| synthesis | chemical reaction when 2 or more simple substances form a new complex substance |
| decomposition | chemical reaction that breaks down compounds |
| replacement | reaction in which 1 substance replaces another |
| activation energy | minimum amount of energy needed to start a chemical reaction. |
| concetration | the amount of 1 material in a certain value of another material |
| catalyst | material that increases the rate of a reaction |
| inhibitor | decreases the rate of a reaction |
| solution | well mixed mixture containing a solute and at least 1 solvent |
| dilute solution | only a little solute dissolved in it |
| enzyme | bio catalyst that lowers activation energy |
| solvent | dissolves solute |
| solute | dissolved by solvent |
| suspension | seen and easily separated mixture |
Created by:
someguy26
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