C4

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Across
  1. 3. what is a period in the periodic table called?
  2. 4. these are charged partials
  3. 5. his is the name for group 7
  4. 6. it can be used to prevent rust
  5. 8. methane + oxygen ---> carbon dioxide + water
  6. 10. this is a bond between non-metals and a non-metal
  7. 11. this can be found in the atoms shell
  8. 12. this has the same number of protons in its nucleus but a different number of neutrons
  9. 13. he is the scientist who decided to leave gaps in the periodic table
Down
  1. 1. this has no charge
  2. 2. the melting of sodium chloride
  3. 6. this is formed between metals and non-metals
  4. 7. the name of a group in the periodic table
  5. 9. lead + oxygen