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Term | Definition |
---|---|
physical change | a change from one state (solid or liquid or gas) to another without a change in chemical composition |
compound | Made up or consisting of several parts or elements |
insolule | Incapable of being dissolved |
closed system | a region that is isolated from its surroundings by a boundary that admits no transfer of matter or energy across it. |
alkaline-earth meatals | The alkaline earth metals are a group of elements |
ionic bond | a chemical bond in which one atom loses an electron to form a positive ion and the other atom gains an electron to form a negative ion |
heterogeneous mixture | a mixture is a material system made up by two or more different substance which are (mixed) together but are not combined |
melting point | The temperature at which a given solid will melt |
alkali meatals | Any of the highly reactive elements lithium, sodium, potassium. |
ion | An atom or molecule with a net electric charge due to the loss or gain of one or more electrons. |