Across
- 4. electrically charged particle
- 8. educated guess from research or observation
- 10. positively charged particle
- 12. anything that has mass and takes up space
- 13. vertical columns gives umber of valence electrons
- 15. refers to the number of protons
- 16. refers to the number of protons and neutrons
- 17. horizontal rows that show many energy shells
- 18. has a negative charge and little to no mass
- 19. does not have a charge but it has mass
Down
- 1. electrons number of electrons in outer shell
- 2. can be seen or measured
- 3. has a positive charge and it has mass
- 5. letter or group of letters representing an element
- 6. negatively charged particle
- 7. refers to how an element reacts
- 9. way to solve a problem
- 11. simplest form of matter
- 14. amount of matter in an object