Grade 10 Science: What do you remember from before?

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