| A | B |
|---|
| matter | has mass & takes up space |
| molecule | smallest particle of a substance |
| atom | building block of matter |
| solid | definate shape and volume |
| liquid | definate volume; no definate shape |
| gas | no definate volume; no definate shape |
| plasma | hot gas; particles have an electric charge |
| element | made up of one type of atom |
| these 92 are found in nature | natural elements |
| compound | when atoms of 2 or more elements join together |
| nucleus | center part of the atom |
| proton | particle in the nucleus with a positive charge |
| neutron | particle in the nucleus that is neutral or no charge |
| electron | particle that moves around outside of the nucleus with a negative charge |
| atomic number | a number equal to the number of protons |
| atomic mass or mass number | a number equal to the sum of the number of protons and neutrons |
| solid | molecules are attracted or pull towards each other |
| liquid | the shape will change to fit the container |
| gas | molecules ar farther apart than in a liquid or solid |
| solid | molecules vibrate but stay close to each other |
| liquid | molecules slide past each other |
| gas | attraction between molecules is very weak |
| gas | moleculels move around freely and always fill the container they are in |
| plasma | rare on earth but common inthe universe |
| plasma | all stars including the sun are this |
