Across
- 2. takes up space
- 3. hard but liable to break or shatter easily.
- 6. block of chemistry
- 8. no electric charge
- 9. polished metal
Down
- 1. made of steel
- 4. negative charge on atom
- 5. a part or aspect of something abstract,
- 7. positive charge on atom
- 8. charge central core of atom