Homework: Conclusion

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Across
  1. 2. Subatomic particle with no charge
  2. 5. The 18 columns in a periodic table are known as
  3. 6. Reactions that absorb energy through heat
  4. 7. Subatomic particle with positive charge
  5. 8. Reactions that release energy through heat
  6. 9. Subatomic particle with negative charge
Down
  1. 1. When a solid changes into a liquid
  2. 3. The 7 rows in a periodic table are known as
  3. 4. When a liquid changes into a solid