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Vocabulary chapter 2
Term | Definition |
---|---|
Pure substance | Matter that always has the same composition. |
element | Substance that can not be broken down into simpler substances. |
atom | smallest particle of an element. |
compound | Made from two or more simpler substances and is able to be broken down. |
heterogeneous mixture | The parts in the mixture are noticeably different from one another. |
homogeneous mixture | The substances are so carefully divided you can barely tell one substance from another. |
solution | When substances dissolve and create a homogeneous mixture. |
suspension | heterogeneous mixture that seperates into layers over time |
colloid | contains particles that are large, medium, and small. |
Physical Property | Any characteristic of a metal that can be observed without changing the composition of the substance |
Viscosity | Resistance of flowing |
Conductivity | Ability to allow heat to flow |
Malleability | Ability to be hammered without shattering |
Melting point | When a solid changed to a liquid |
Boiling point | the temperature at which a substance boils |
Filtration | Process that separates material based on their particle sizes |
Distillation | Process that separates the substances based on boiling point |
Physical change | when the substances stay the same but the look changes |
Chemical property | Ability to change the composition of matter |
Flammability | ability to burn in presence of oxygen |
reactivity | property that describes how readily a substance combines with another |
Chemical change | when a substance reacts and forms one or more new substances |
precipitate | any solid that forms and separates from any liquid |