Across
- 3. a mutual attraction between two atoms that forms a bon
- 4. a substance that causes or accelerates a chemical reaction without itself being affected
- 7. modern chemistry dates back to ____
- 9. one of a class of substances that cannot be separated into simpler substances by chemical means
- 10. the law of definite proportions was developed by ____ in 1803
- 11. an offhand version of chemistry not based on facts and observations
- 12. the science that deals with the composition and properties of substances and various elementary forms of matter
- 13. the capacity for vigorous activity; available power
Down
- 1. what did the two Greek philosophers, Democritus and Leucippus, discover?
- 2. anything that has mass and takes up space
- 5. Chemistry is derived from what word
- 6. chemistry began to make noticeable progress in the 16th and 17th centuries due to ____
- 8. one of history’s most universally recognized scientists