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Elements & Compounds
review of basic matter related vocabulary
| Question | Answer |
|---|---|
| matter | the stuff that all objects and substances in the universe are made of |
| volume | the space matter occupies (takes up) |
| mass | a measure of the amount of matter in a given object |
| properties | characteristics that help us identify or classify matter |
| density | the amount of matter in a given space |
| ductility | the ability to be pulled into a thin strand, like wire |
| malleablility | the ability to be pressed or pounded into a thin sheet,like aluminum foil |
| boiling point | the temperature at which a substance changes from a liquid into a gas |
| melting point | the temperature at which a substance changes from a solid into a liquid |
| conductivity | how well a substance allows heat or electricity to flow through it |
| element | different kinds of atoms; simplest form of matter |
| compounds | two or more elements that are combined to make a new substance with new properties |
| molecule | two or more combined atoms that are the smallest particle of a substance that keeps the properties of the substance |
| reactants | substances that change during a reaction (what you start with) |
| products | substances that are a result of a reaction (what you end up with) |
| mixture | a combination of two or more substances that have not combined chemically |
| pure substance | only one substance: can be either an element or compound |
| metal | element on the right of the periodic table; good conductors, high density, shiny, malleable, ductile |
| non-metal | element on the left of the periodic table; poor conductors, dull, brittle |
| metalloid | found on the stair step of the periodic table; properties of both metals and non-metals; semi-conductors |
| brittle | breaks easily |
| luster | how well a substance reflects light; shiny means lots of reflection; dull means little reflection |