| A | B |
|---|
| atom | the smallest piece of an element |
| atomic number | number of protons in the nucleus of an atom |
| chemical change | a change in which new substances with different properties are formed |
| chemical properties | properties of a substance that depend upon the behavior of that substance in the presence of other substances |
| chemistry | the study of the properties of matter |
| colloid | a mixture in which substances mix but do not dissolve |
| compound | a substance formed when two or more elements are chemically joined |
| electron | a negatively charged particle that makes up part of the atom |
| electron cloud model | modern model of the atom |
| element | a substance that cannot be broken down into simpler substances by a chemical change |
| matter | anything that has mass and takes up space |
| mixture | two or more substances that are physically mixed but not chemically joined |
| neutron | an atomic particle with no charge |
| physical change | a change in size, shape,color, or physical state of a substance |
| physical properties | characteristics of a substance that can be observed and measured without changing the composition of the substance |
| proton | a positively charged particle found in the nucleus of an atom |
| solute | the substance dissolved in a solution |
| solution | a mixture composed of two or more substances |
| solvent | the substance that dissolved the solute in a solution |
| suspension | a mixture in which substances mix but do not dissolve |
