Across
- 9. neutral particle
- 11. a type if metals that are good conductors
- 15. a different version of an element
- 16. horizontal row in the periodic table
- 18. reactive to air
- 20. when an atom loses an electron
- 21. more neutrons than protons
- 22. the probability of particle being somewhere
Down
- 1. form all gasses
- 2. terrible conductors of electricity
- 3. when there is an extra or less particle
- 4. the unit of measurement in the atomic mass
- 5. negatively charged particle
- 6. rare earth metals
- 7. positively charged particle
- 8. vertical row in the periodic table
- 10. center of an atom
- 12. gasses found in the atmosphere
- 13. more electrons than protons
- 14. has no color
- 17. the number of protons in an atom
- 19. great conductors of electricity