Across
- 3. Two or more atoms bonded together.
- 7. A pure substance made up of only one type of atom.
- 9. A solid substance with a regular and repeating arrangement of particles.
- 10. A neutral particle found in the nucleus of an atom.
- 11. A slow chemical reaction between iron, water, and oxygen.
- 13. Mass per unit volume; determines how heavy something is for its size.
- 14. A chemical reaction in which a substance burns in oxygen to release heat.
Down
- 1. A mixture of two or more metals, or a metal and a non-metal.
- 2. A negatively charged particle that moves around the nucleus.
- 4. The process of forming solid crystals from a solution.
- 5. The amount of space an object or substance occupies.
- 6. A substance with a sour taste and pH less than 7; turns blue litmus red.
- 8. A combination of two or more substances that do not chemically combine.
- 10. "Makes up most of the air we breathe, but we can't use it directly."
- 12. The smallest unit of matter that retains the properties of an element.