| A | B |
|---|
| A shorthand way to write the name of an element | Chemical Symbol |
| The positively charged center of an atom | Nucleus |
| A negatively charged particle that orbits around the nucleus of an atom | Electron |
| A particle in the nucleus of an atom that has a positive charge | Proton |
| A particle in the nucleus of an atom that has no electrical charge | Neutron |
| The number of protons in an atom's nucleus | Atomic number |
| The average mass of one atom of an element | Atomic Mass |
| A table of the elements, in order by increasing atomic mass, arranged in rows and columns to show their repeated properties | Periodic table |
| One of the 18 vertical columns in the periodic table | Group |
| A diagram of an atom, using the element symbol with dots to show the electrons in the outer energy level | Dot diagram |
| A horizontal row of elements in the periodic table; increasing from left to right is the number of electrons in the atoms' outer shell | Period |
| An element that usually lacks the characterics of a metal | Nonmetal |
| An element having some properties of both a metal and a nonmetal | Metalloid |
| A term used to describe a material that can be pulled out into a long wire | Ductile |
| An explosion that breaks apart a massive star | Super Nova |
| A transfer of thermal energy between particles within a substance | Conductor |
| a state of matter in which atoms are stripped of their electrons and the nuclei are packed closely together | Plasma |
| a substance that can conduct electricity under some conditions | Semi-Conductor |
| the process in which smaller nuclei combine into larger nuclei forming a heavier element | Nuclear Fusion |
| The electrons farthest away from the nucleus of an atom and are involved in chemical reactions | Valence Electron |
| A unit of measurement for the mass of particles in an atom | AMU |
| An element in group 18 of the periodic table | Nobel Gas |
| Elements in the same vertical column of the periodic table; also called a group | Family |
| An element in groups 2-13 of the periodic table | Transition Metals |
| A characteristic of those metals that are attracted to magnets and can be made into magnets | Magnetic |
| Elements in group 17 of the periodic table | Halogen Family |
