Chemistry

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Across
  1. 2. The mechanical process to seperate solids from the fluids
  2. 5. Chemical formula for Ammonia
  3. 6. Blue litmus paper turns ______ under acidic conditions.
  4. 9. An indivisible and basic unit of matter
  5. 11. A strong base that dissolves in water
  6. 12. Unit of measurement of time
  7. 13. It is definded as mass divided by volume
Down
  1. 1. The process through which a substance changes from liquid to solid
  2. 3. The centre of an atom is called _____
  3. 4. It is a study of matter and the changes it undergoes
  4. 7. Positive ions are called ______
  5. 8. The only metal that is in liquid form at room temperature
  6. 10. Anything that has mass and occupies volume