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Chem Set 2
Physical & Chemical Changes
Question | Answer |
---|---|
Brittle | easily broken apart |
Conductive | an object that is able to transfer electricity or heat through it, an example is iron or glass |
Corrosive | the destruction of metal due to a chemical reaction |
Ductile | an object that is able to be rolled into a wire, copper is an example |
Insulator | material that DOES NOT allow electricity or heat to flow through easily |
Luster | the sheen of an object, how shiny it is |
Malleable | an object that is able to be bent or shaped, ex. gold & silver |
Physical change | a way to describe a change in matter DOES NOT change it chemical identity |
Reactivity | how easy or difficult (the speed) an element or compound combines with another one |
Sublimation | change in state from a solid directly to a gas without turning to a liquid |
Precipitate | a chemical change that happens when 2 different insoluble liquids are combined and create a solid |
Evidence of a Chemical Change | color change, formation of a precipitate (a solid from 2 liquids), formation of a gas (bubble), odor change, temperature change (hot/cold) |
Evaporation | state of matter change from a liquid to a gas |
Condensation | state of matter change from a gas to a liquid |
Deposition | state of matter change from a gas to a solid |
Melting | state of matter change from a solid to a liquid |
Freezing | state of matter change from a liquid to a solid |
Chemical Change | chemical reaction involving the rearrangement of the atoms of one or more substances. This changes the chemical properties of the original substances resulting in the formation of at least one new substance |
Solution | aka homogeneous mixture |
Alloy | a solid mixture of two or more metals, ex. brass b/c it is a mixture of copper and zinc |
Compound | A pure substance that chemically combines with two or more elements |
Heterogeneous Mixture | A mixture where the substances aren't equally distributed, See the different parts |
Homogeneous Mixture | mixture of 2 or more substances that you cannot see the different parts |
Element | A pure substance that cannot be broken down, Found on the PT |
Solvent | The part of the solution that does the dissolving |
Solute | The part of the solution being dissolved |