Chemistry

12345678
Across
  1. 6. the half life of uranium 238 is 4.5 billion years
  2. 7. modern scientist use a Geiger counter to detect radioactivity
  3. 8. Taste bitter and turn red litmus paper pink red
Down
  1. 1. molding material that can retain its shape
  2. 2. Property– describes the way a substance reacts with other substances
  3. 3. Compound– chemical building blocks of all known living things
  4. 4. produce new substances with chemical properties that are different from those of the original substances
  5. 5. substance produced by a chemical change is a produced