Across
- 3. A group of atoms bonded together
- 4. A subatomic particle with no charge
- 9. A substance combination with no chemical reaction
- 10. smallest particle of a chemical element
- 11. A subatomic particle with a positive charge
- 12. A homogeneous mixture made of two or more substances
Down
- 1. A substance that cannot be broken down chemically
- 2. The needed amount of electrons to fill a shell of an atom
- 5. A subatomic particle with a negative charge
- 6. A chemical compound that is a good conductor
- 7. The name given to the horizontal row in a periodic table
- 8. A substance made by chemically combined elements