| A | B |
|---|
| material all substances are made of | matter |
| all atoms are alike in this substance | element |
| substance made of two or more elements | compound |
| combination of two or more substances, not chemically combined, separated physically | mixture |
| substance that produces hydrogen ions | acid |
| substance that produces hydroxide ions | base |
| ionic compound, reaction of acid and base | salt |
| material made up of living things | organic |
| matter not made of living things | inorganic |
| matter has definite shape and volume | solid |
| fats, oils, amatter has no definite shape or volume | gas |
| matter has no definite shape but definite volume | liquid |
| characteristic of a material that can be observed without changing the identity | physical properties |
| characteristic of a substance that indicates a change it can undergo | chemical properties |
| a table of the elements arranded according to repeated changes | periodic table |
| the number of protons in an atom | atomic number |
| average mass of one atom of an element | atomic mass |
| group, column of elements on periodic table, properties in common | chemical families |
| a horizontal row in the periodic table | period |
| electrons in outermost energy level of atom, chemical properties | valence numbers |
| shiny, good conductors of heat and electricity, solid at room temperature | metals |
| have properties of metals and nonmetals | metalloids |
| usually gases or brittle at room temperature, poor heat and electricity conductors | nonmetals |
| energy can not be created or destroyed, it can change or be transferred | Law of Conservation of Matter and Energy |
| one or more physical properties change form | physical change |
| the amount of substance that will dissolve | solubility |
| combine nuclei of lighter elements to form nuclei of heavier elements | nuclear reaction |
| the starting substances in a chemical reaction | reactants |
| compound or element the result of chemical reaction | product |
| stored energy | potential energy |
