Across
- 3. Man's best friend
- 4. a subatomic particle with a negative charge
- 7. Likes to chase mice
- 8. Has a trunk
- 10. two or more atoms combined to form new substance
- 11. basic building block of all matter
- 12. Flying mammal
- 13. Large marsupial
Down
- 1. purest form of an atom
- 2. two or more atoms bonded
- 4. structure multiple molecules bonded multipole times in a repeating pattern
- 5. a subatomic particle with a neutral charge
- 6. a subatomic particle with a positive charge
- 9. substances the same consisitant atom through out
- 10. anything with mass and volume