| A | B |
|---|
| proton | has a positive charge and located inside the nucleus of an atom |
| neutron | has a neutral charge and located inside the nucleus of an atom |
| electron | has a negative charge and can be found spinning outside the nucleus of an atom in a cloud |
| matter | anything that has mass and takes up space |
| molecule | the smallest particle of a compoud that still has all the qualities of that compound |
| group/family | the elements located in the vertical columns on the periodic table have similar chemical properties |
| period | horizontal rows on the periodic table |
| atomic number | the number of protons in an atom of an element |
| solid | has a definate shape and definate volume |
| liquid | has a definate volume, but no definate shape |
| gas | does not have a definate shape or definate volumn |
| saturated solution | as much solute as possible has been dissolved by the solvent |
| boiling point | point at which a liquid will vaporize |
| heterogeneous mixture | a mixture composed of different substances |
| density | a physical property of matter characterized by mass divided by volume |
| homogeneous mixture | a mixture composed of similar sustances |
| atomic mass | the number of protons plus the number of neutrons |
| sublimation | the process in which a solid changes directly into a gas |
| alloy | a metal made by heating, melting, and mixting two or more metals |
| physical property | a characteristic that can be observed or measured |
| atomic number | how elements are arranged on the periodic table and tells how many protons an element has |
| compound | a substance made by chemically combining two or more elements |
| subtstances with a desity less than 1.0 grams/cubed cm | will float in water |
| universal solvent | water |
