Chemistry crossword

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Across
  1. 2. an element that combines with oxygen to form water
  2. 4. an ion with a negative electrical charge
  3. 6. a form of carbon,it’s non-metal but is an electrical conductor
  4. 7. an ion with a positive electrical charge
  5. 8. the reactivity of the elements of this group decreases down the group
  6. 9. it have some properties similar to those of metals and some properties similar to those of non-metals
  7. 10. a reddish brown non-metallic liquid element
Down
  1. 1. the electrostatic attraction (i.e.attraction between opposite charges)between negatively charged delocalized electrons and positively charged metal ion
  2. 3. an atomic particle that has no electricalcharge
  3. 5. atoms of the same element,with the same number of protons but different numbers of neutrons
  4. 8. an element in group0 but the outermost electrons is not 8