Chemical Reactions

12345678910111213141516171819
Across
  1. 4. Another word for a chemical change
  2. 5. Two or more atoms chemically joined together
  3. 6. Positively charged particles (plural) in the nucleus
  4. 8. Smallest unit of an element that keeps its properties
  5. 11. Negative (–) particle that moves around the center
  6. 12. Tiny building blocks that make up molecules (plural)
  7. 14. Neutral particle in the atom’s center
  8. 16. Particles with no charge (plural) in the nucleus
  9. 19. Lightest element; part of water
Down
  1. 1. New materials made by a chemical change
  2. 2. Formula for something we drinks
  3. 3. Negatively charged particles (plural) in atoms
  4. 4. Starting materials in a chemical change
  5. 7. Gas needed for burning and by your cells (formula O₂)
  6. 9. Positive (+) particle in the atom’s center
  7. 10. Common liquid with formula H₂O
  8. 13. The center of an atom with protons and neutrons
  9. 15. The link that holds atoms together
  10. 17. Formula for the gas we breathe
  11. 18. Gas exhaled by humans formula