| Definition of term | Vocabulary term |
| positively charged particle in an atom’s nucleus. | |
| The smallest particles of an element which still displays the properties of that element. Also known as building blocks of matter. | |
| Symbols used to show how many valence electrons an atom has. Also called Lewis Structures | |
| Bond between elements where the electronegativity difference is less than 2.0.- the atoms share electrons either equally or somewhat unequally. | |
| The minimum amount of energy required to completely remove an electron from a gaseous atom or ion | |
| Negatively charged particle outside an atom’s nucleus. | |
| Bond between elements where the electronegativity difference is less than 2.0- the atoms share electrons equally. | |
| Elements that are good conductors, are malleable and ductile. | |
| A molecule comprised of two atoms. | |
| Bond between elements where the electronegativity difference is 2.0 or greater- one atom takes the other’s electrons. | |
| The neutral particle in an atom’s nucleus. | |
| The seven horizontal rows in the periodic table | |
| The smallest particle of a substance which still displays the properties of that substance that may or may not contain just one kind of atom chemically bonded. | |
| Two or more elements that have been chemically combined. | |
| The 18 vertical columns in the Periodic Table of Elements. Each element in a ____ has the same number of electrons in its outer shell. | |
| Four numbers that describe the “address” of an electron in an atom according to a mathematical model | |
| Two atoms of the same element with different atomic masses. | |