| A | B |
|---|
| Compound | a substance whose smallest particles include more than one element chemically bonded together. |
| Mixture | a substance that includes more than one type of element or compound that are NOT bonded together. |
| Chemical Bond | a bond formed between atoms through the sharing or transferring of electrons. |
| Covalent Bond | a type of chemical bond formed by shared electrons. |
| Molecule | a group of atoms held together by covalent bonds. |
| Chemical Formula | identifies the number and element of each type of atom in a compound. I.e H2O |
| Ion | an atom that has an electric charge different from zero. They are created when atoms gain or lose electrons. |
| Ionic Bond | a bond that transfers an electron from one atom to another resulting in attraction between oppositely charged ions. |
| Valence Electrons | electrons in the highest unfilled energy level of an atom. These electrons participate in chemical bonding. |
| Oxidation Number | indicates the charge of an atom when an electron is lost, gained or shared in a chemical bond. 1+ means an electron is lost; 1- means an electron is gained. |
