Across
- 4. Solids, liquids, and gases
- 7. A test under controlled conditions
- 8. An atom or group of atoms that has a positive or negative charge
- 10. A group of atoms bonded together
- 11. The centre of an atom
Down
- 1. There are 262 of these on the periodic table
- 2. A subatomic particle with a positive charge
- 3. Place where scientists work breaker
- 5. A subatomic particle with a negative charge
- 6. A wide glass vessel with a pouring lip
- 9. A subatomic particle with no charge