Across
- 4. made up of atoms
- 5. two or more elements
- 7. atoms attach using this kind of bond
- 8. negative charge
- 9. smallest piece of matter
- 12. when you can't see the parts
- 13. the thickness
- 14. makes a positive charge
- 17. study of matter
- 18. how much matter is in a object
Down
- 1. the gravitational pull on an object
- 2. 2 or more elements and atoms
- 3. when you can't see the mixture's parts
- 6. something that is pure
- 10. how much space an object holds
- 11. you can see the parts
- 15. are in the middle of the atom
- 16. how it looks