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Chapter 4 Vocabulary
Term | Definition |
---|---|
mixture | matter that consists of two or more substances mixed but not chemically combined |
heterogeneous mixture | substance that does not appear to be the same throughout |
homogeneous mixture | mixture that appears the same throughout |
colloid | homogeneous mixture in which the particles are mixed together but not dissolved |
solution | homogeneous mixture of two or more substances in a single physical state |
solute | substance that is dissolved in a solution |
solvent | substance that does the dissolving in a solution |
soluble | can be dissolved in another material, such as water |
insoluble | unable to be dissolved in another material, such as water |
solubility | measure of how much of a solute can be dissolved in a given amount of solvent under certain conditions |
alloy | a solution of two metals or a metal and a nonmetal that has the properties of a metal |
pure substance | substance made of one kind of material having definite properties |
element | simplest type of a pure substance |
atom | smallest part of an element that has all the properties of an element |
chemical symbol | shorthand way of representing an element |
compound | substance made up of molecules that contain more than one kind of atom; two or more elements chemically combined |
molecule | combination of atoms formed by a covalent bond |
chemical formula | combination of chemical symbols usually used to represent a compound |
subscript | number placed to the lower right of a chemical symbol to indicate the number of atoms of the element in the compound |
chemical equation | expression in which symbols, formulas, and numbers are used to represent a chemical reaction |
coefficient | number that is placed in front of a symbol or a formula in a chemical equation that indicates how many atoms or molecules of this substance are involved in the reaction |
Oxygen, Sodium, Carbon, Oxygen, Hydrogen | Ex. of an Elements |
Na | Symbol for sodium |
Water,iron, oxygen, carbon dioxide | Ex. of a pure substances |
iron and sulfur, concrete, salad dressing | Ex. of heterogeneous mixtures |
salt water,potassium nitrate and water, sugar and water. | Ex. of a solutions |
milk, toothpaste, whipped cream, suntan lotion | Ex. of colloids |
Brass | Ex. of an alloy |