Chemistry Basics

3. The type of table used to organize all known elements.
5. Anything that has mass and occupies space.
7. Neutral particle located in an atom's nucleus.
8. A substance formed when two or more elements are chemically bonded in fixed ratios.
11. Dense center of an atom containing protons and neutrons.
12. A physical combination of substances that can be separated without chemical change.
13. A process in which substances are rearranged to form new substances.

1. The ratio of mass to volume used to identify substances.
2. Two or more atoms held together by covalent bonds.
3. Positively charged particle found in the nucleus.
4. Negatively charged particle found outside the nucleus.
6. The smallest unit of an element that retains its chemical identity.
9. A pure substance made of only one type of atom.
10. A measure of the amount of matter in an object.
14. Law stating that mass is neither created nor destroyed during a chemical reaction.