Across
- 3. figures all the digits that can be known precisely in a measurement
- 5. A mixture that is completely uniform in its composition
- 7. matter that has a definite shape and volume
- 9. The ratio of the mass of an object to it volume
- 10. the amount of matter in an object
- 11. negative and a negative or positive and a positive charge
- 14. a homogeneous mixture
- 16. a pair of valence electrons that is not involved in bonding
- 17. a negatively charged subatomic particle
- 18. a starting substance in a chemical reaction
- 19. A reaction that has to do with fire
- 20. atoms of the same element that have the same atomic number
Down
- 1. positive and negative charges
- 2. a chemical equation in which mass is converted
- 4. a mixture that is not uniform in composition
- 6. A substance that can not be changed into something simpler
- 8. the smallest particle of an element
- 12. the space occupied by a sample of matter
- 13. an arrangement of elements into rows and columbs
- 15. anything that takes up space and has mass