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lets go #71

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.
Created by: leftbrain