elements compunds and mixtures vocabulary

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Across
  1. 4. using chemical symbols eg water is h20
  2. 5. A chemical substance whose atoms all have the same number of protons.
  3. 6. such as drawing metals into a thin wire without breaking.
  4. 10. A substance formed by a different types of elements
  5. 13. A molecule formed from two atoms.
  6. 14. a characteristic e.g. colour state melting point
  7. 15. a substance is poisonous and may cause harm
  8. 16. a system for categorising materials
  9. 17. wen s substance usually a ,metal
Down
  1. 1. a molecule consisting of only one atom
  2. 2. a number based on how many protons it has
  3. 3. Each element has its own symbol
  4. 7. How much a substance is able to transfer heat or electricity.
  5. 8. any class of elements
  6. 9. the ability of a system to do work
  7. 11. any substance that has mass and takes up space
  8. 12. contains protons neutrons and electrons inside