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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 |