Across
- 5. What we breath
- 6. Part of a element
- 7. Has a positive electric charge
- 9. A basic part of whole
- 10. when a atom loses or gains 1 electron
- 11. Made the periodic table
- 12. firm and stable in shape
Down
- 1. Made up of 1 or more atoms
- 2. The study of substances
- 3. atoms move freely inside it
- 4. When 2 or substances make a new one
- 8. Has a neutral charge