| A | B |
|---|
| atom | the smallest particle of an element that can exist alone or in combination with other atoms |
| compounds | substances made of two or more elements that cannot be separated by physical means |
| elements | substances that contain only one kind of matter |
| heterogeneous mixture | a mixture in which every sample of it might have a different composition |
| homogeneous mixture | a mixture in which every sample of it has the same composition |
| law of conservation of mass | states that the total mass of products of a reation is equal to the total mass of the reactants |
| matter | anything that has mass and takes up space |
| mixtures | substances that contain more than one kind of matter |
| molecule | the smallest particle of a compound that retains the properties of the compound. |
| substances | a mixture that cannot be separated into different kinds of matter using physical means. |
