Across
- 3. the third energy level can hold ___ electrons
- 4. atomic mass is 4.0
- 6. atomic number is 14
- 8. right side of the periodic table
- 9. electrons arrange into rings called...
- 11. neutral charge
- 14. what do you use to weigh atoms
- 15. the stair step on the periodic table
- 17. surrounds the nucleus
- 19. the first energy level can hold ___ electrons
- 20. left side of the periodic table
Down
- 1. how much does an electron weigh
- 2. go from left to right in rows
- 5. positive charge
- 7. determine reactivity
- 10. run up and down in columns
- 12. the middle of an atom
- 13. negative charge
- 16. smallest part of an atom
- 18. how much protons and neutrons weigh