Grade 10 Science: What do you remember from before?

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Across
  1. 2. The subatomic particle with a negative charge.
  2. 4. A bond made from a metal and a non metal.
  3. 8. The subatomic particle with a positive charge.
  4. 9. This piece of equipment 🧪
  5. 13. When gas turns into a liquid.
  6. 15. Ice melting is an example of a _?_ change.
  7. 16. The centre to the atom.
  8. 17. The element with the symbol Fe.
  9. 18. The element with the symbol Mg.
Down
  1. 1. H2O is also known as?
  2. 3. The Family of Elements containing He, Ne, and Ar.
  3. 5. The element with the atomic number 12.
  4. 6. Toast burning is an example of a _?_ change.
  5. 7. Carbon dioxide, water and sugar are examples of …
  6. 10. The safety symbol ☣️
  7. 11. The element with the atomic mass 39.1 amu.
  8. 12. The safety symbol☠️.
  9. 14. The subatomic particle with NO charge.