Chemistry

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Across
  1. 4. pH level of neutral substance
  2. 5. Chemical reaction that releases heat
  3. 7. Type of bond formed by losing or gaining electrons
  4. 9. where oxygen is added to a substance
  5. 11. Chemical substance that speeds up reactions
  6. 12. Type of ion formed when an atom gains electrons
  7. 15. number of atoms or ions in one mole of a substance
  8. 16. group of two or more atoms that are held together by attractive forces known as chemical bon
  9. 18. any atom or group of atoms that bears one or more charge
  10. 19. Reaction between an acid and a base
  11. 20. Substance made of two or more elements chemically combined
Down
  1. 1. process by which electric current is passed through a substance
  2. 2. A process where gas turns into liquid
  3. 3. A process where electrons are gained
  4. 6. type of bonding in metals
  5. 8. chemical formula showing the simplest ratio of the elements rather than the total number of atoms in the molecule
  6. 10. Group elements in group 7
  7. 13. pH level of a strong acid
  8. 14. mixture where particles are evenly distributed
  9. 17. Ion with positive charge