Across
- 1. has a positive charge
- 4. has a diameter a million times greater than an atom
- 6. substances always have the ___ composition
- 8. has a negative charge
- 11. a heterogeneous mixture is ____ mixed
- 12. substances and mixtures are ____ of matter
- 14. a homogeneous mixture is ____ mixed
- 17. has a neutral charge
- 18. Everything that takes up space
- 19. salt ____ in water
Down
- 2. part in the middle of an atom
- 3. a compound often has ____ properties from the elements that compose it
- 5. chemical formula of water
- 7. Makes up everything takes up space
- 9. 118 is the number of known _____
- 10. electrons are located in the electron ____
- 13. the combination of symbols and numbers that represent a compound
- 15. the amount of electron is an element is ___ to the amount of protons
- 16. A black solid
- 20. mixtures can ___ in composition