Across
- 4. movement of electrons.
- 5. building blocks of matter.
- 6. charges repel
- 8. negatively-charged particle.
- 9. electricity is caused by separation of charges.
- 10. charges attract.
Down
- 1. everything around us.
- 2. separates the charges.
- 3. atom has equal number of protons and electrons
- 7. positively-charged particle