Across
- 2. Two or more atoms chemically bonded together
- 4. What goes into a chemical reaction (found on the left side of the arrow)
- 5. The element that makes up the majority of the Earth's crust and human body
- 9. Chemical equations must have an equal number of atoms on each side in order to be _________.
- 10. The smallest piece of a compound that can exist
- 11. The most important compound on planet Earth
Down
- 1. Elements _____ through various Earth systems
- 3. The element that makes up 78% of the air we breathe
- 6. The subatomic particle that is important for chemical bonding
- 7. The chemical formula for table salt
- 8. What the arrow in a chemical reaction points to