Across
- 5. which have negative charge.
- 7. which have a positive charge.
- 8. its atomic number is 6.
- 10. are neither created nor destroyed in chemical reactions.
Down
- 1. is made up of very small particle called atoms.
- 2. a primary substance that cannot be separated into simpler material.
- 3. he Dalton is considered the originator of modern atomic theory.
- 4. who formulated an atomic theory for the universe.
- 6. it's symbol is Zn.
- 9. he discover Brownian movement.