| A | B |
|---|
| They are substances held together by physical forces, not chemical | mixture |
| homogeneous mixture whose components cannot be distinguished | solution |
| occurs when a substance reacts and forms one or more new substances | chemical change |
| some properties of a material change, but the substances in the material stay the same | physical change |
| positively charged particle located in the nucleus of an atom | proton |
| particle without an electrical charge that is located in the nucleus of an atom | neutron |
| negatively charged particle that moves around the nucleus of an atom | electron |
| particles that are tightly packed together | solid |
| particles that can easily move or slide past one another | liquid |
| particles that are separated with no regular pattern | gas |
| anything that has mass and takes up space | matter |
| the amount of matter in an object | mass |
| tiny building blocks of matter | atom |
| a substance made of one type of atom | element |
| contains atoms of more than one type of element that are chemically bonded together | compound |
| they are made up of free electrons and ions | plasma |
| super-unexcited and super-cold atoms | B.E.C. |
| when a liquid changes a gas | evaporation |
| a group of atoms that are connected | molecules |
| an element that is found in everything | carbon |
| the number of protons in an element | atomic number |
