Across
- 1. a liquid with a pH value above 7
- 6. a substance formed through a chemical reaction
- 7. a subatomic particle with a neutral charge
- 8. a liquid with a pH value below 7
- 9. The mass of an atom
- 11. He made the Table of Elements periodic
- 12. a substance that undergoes change during a reaction
- 14. toxicity, flammability, and reactivity
- 17. a subatomic particle with a positive charge
- 18. a mixture that is the same all over (not soup)
- 19. a mixture of different metals to make a new metal
Down
- 2. a substance that cannot be broken down into simpler substances
- 3. when liquid gets cold and turns into a solid
- 4. when "clouds" form in a liquid
- 5. materials mixed together
- 6. color, texture, and density
- 10. a subatomic particle with a negative charge
- 13. The building blocks of matter
- 15. A thing that is made of two or more elements
- 16. the reaction of iron, oxygen, and water