Chemistry

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Across
  1. 1. A particle with negative charge
  2. 5. A silver grey metal
  3. 6. Elements in water
  4. 10. The table full of elements
  5. 12. A soft light metallic element
  6. 13. The rows in periodic table
  7. 15. Forms about 78% of earth's atmosphere
  8. 17. A column of elements in the periodic table
Down
  1. 2. Combined with water in swimming pools
  2. 3. Same mass as Proton but with no electric charge
  3. 4. A silver-white metal
  4. 6. The first element in periodic table
  5. 7. Two or more elements Chemically combined.
  6. 8. A compound released into the atmosphere
  7. 9. Gas found in balloons
  8. 11. A Soft Grey Metal
  9. 13. A particle with positive charge
  10. 14. A basic unit of chemical elements
  11. 16. When going through photosynthesis the plant gives out?