Across
- 1. negative charge
- 4. circular path of particles
- 6. positive particle
- 7. Reactions exiting energy
- 10. negative particle
- 13. positive charge
- 14. it's never free of charge
- 17. Reactions entering entering
- 19. Table tables of elements
- 20. column
Down
- 2. form of an atom
- 3. periodic table item
- 5. Electron electrons on the final shell
- 8. balance
- 9. Bond sharing electrons
- 11. in an element
- 12. Bond transfer of valence electrons
- 15. consisting of several parts
- 16. row
- 18. neutral particle