INTRODUCTION TO CHEMISTRY

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Across
  1. 3. is the main component of Talcum powder .
  2. 4. was the first fiber created ?
  3. 5. are substances that contain sulphates of compound fertilizers help to increase the production of food.
  4. 8. proposed the atomic theory
  5. 9. is the non toxic mineral that the core of the pencil
  6. 10. is neither loss nor created
  7. 11. identified and named Oxygen in 1778
  8. 12. the year in which PET was formed
Down
  1. 1. an Antibiotic medicine
  2. 2. created the periodic table
  3. 6. periodic table has been updated to include 92 naturally occurring elements and 26 synthesized elements.
  4. 7. is used in cheese as a preservative
  5. 13. was the year in which the eraser was created