| A | B |
| Acid | Any substance that increases the H= ion concenration of a solution. |
| Atom | Smallest particle of an element that retains the property of that element. |
| Base | Any substance that decreased he H+ ion concentration of a solution. |
| Carbohydrate | Organic compound containing carbon, hydrogen, and oxygen. |
| Covalent bond | Chemical bond formed when atoms shares electrons. |
| Electrolyte | Substance that dissociates in solution to form ions. |
| Element | Substance that cannot be broken down. |
| Enzymes | Largest group of proteins, catalyze chemical reactions without being changed themselves. |
| Ion | ATom that has become electricaly charged by the loss or gain of electrons. |
| Ionic bond | Chemical bond formed when an atom donates an electron to another atom |
| Lipid | Water-insoluble organic biomolecule; fat, and fatlike compounds |
| Nucleic Acid | Polymer of nucleotides that make up DNA and RNA |
| Protein | Organic compound composed of amino acids |