| A | B |
|---|
| balanced chemical equation | has the same number of atoms of each element on both sides of the equation |
| boiling | change of state from a liquid to a gas at high temperatures |
| boiling point | temperature at which a liquid has enough energy to escape the atmosphere and become a gas; temperature something boils |
| change in state | change from or to: solid <--> liquid, liquid <--> gas, solid <--> gas |
| chemical formula | statement that tells the ratio of each element in a compound |
| chemical equation | written expression, usually shown with symbols, that shows reactants and products in a chemical reaction |
| chemically stable | atom whose outer energy level is completely filled with electrons |
| coefficient | number located in front of a formula, showing the number of units of each substance in an equation |
| condensation | change of state from a gas to a liquid |
| fluid | any material that flows |
| freezing | change of state from liquid to solid |
| freezing point | temperature at which a substance changes from a liquid to a solid |
| gas | state of matter with no definite shape or volume |
| law of conservation of mass | matter is neither created nor destroyed, but it can change from one form to another |
| liquid | state of matter that has a definite volume, but no definite shape |
| matter | anything that has mass and takes up space |
| melting | change of state from a solid to a liquid |
| molecule | two or more atoms chemically combined; covalently bonded nonmetals |
| product | elements and compounds found to the right of the arrow in a chemical equation |
| reactant | elements and compounds found to the left of the arrow in a chemical equation |
| solid | state of matter that has a fixed volume and shape |
| state of matter | solid, liquid, gas, plasma |
| sublimation | change of state directly from a solid to a gas |
| subscript | number found at the bottom right of an element that tells how many atoms of that element there are |
| superscript | number found at the top right of a chemical formula, usually showing charge or oxidation number |
| temperature | measure of the average kinetic energy of the particles that make up a sample of matter |
| vapor | another word for gas; refers to a substance in the gaseous state that is not usually in the gaseous state at room temperature |
