| Term | Definition |
|---|---|
| Matter | anything that has mass and takes up space |
| Mass | the material/stuff that matter is made up of – it can be measured |
| space/volume | the specific area/pace that matter takes up |
| density | D=m/v the amount of mass in a specific volume of space |
| atom | smallest part of an element, the building blocks of all matter |
| electron | particle of atom with a negative charge, moves around the nucleus and has an attractive force that allows it to bond with other atoms creating everything in the universe |
| proton | particle of an atom with a positive charge located inside the nucleus |
| neutron | particle of an atom with a neutral / no charge located inside the nucleus along with the proton. |
| Periodic Table | large grid that identifies and classifies all of the elements by their chemical and physical properties |
| element | the simplest substances that cannot be broken down / they make up all matter in the universe |
| periods/rows | rows that tell how many energy levels each elements has for the electrons |
| groups or family/columns | columns that tell how many valence electrons each element has / the number of electrons that can move on its outer shell / energy level |
| valence electrons | the electrons that move on the outer shell / energy level of an atom |
| atomic number | how many protons an element has inside the nucleus / usually is same # of neutrons and electrons |
| atomic mass | the measurement of the mass for an electrons atoms |
| chemical property | the ability of substances to combine with one another forming new and different compounds and molecules |
