Across
- 3. A group of atoms made up with the same number of protons.
- 6. Particles whizzing about, filling up all the space.
- 7. Subatomic particle with no charge.
- 8. Gas turning into liquid.
- 9. Positively charged subatomic particle.
- 10. Particles closely packed, moving slowly.
- 11. Two or more elements in a fixed whole number ratio.
- 13. Particles moving quickly but still touching.
Down
- 1. Negatively charged subatomic particle.
- 2. Liquid turning into solid.
- 4. Solid turning into liquid.
- 5. Liquid turning into gas.
- 12. Two or more particles in a fixed whole number ratio.