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