Across
- 3. A substance that exists before a chemical reaction takes place and that changes as a result of the reaction
- 5. A limitation on the range of possible solutions to a design problem
- 7. A group of two or more atoms that are held together by chemical bonds
- 8. An individual particle of an element
Down
- 1. A process in which one or more new substances form from other substances
- 2. A new substance that forms during a chemical reaction
- 4. Matter that has constant chemical composition and characteristic's
- 5. The requirements that must be met for an engineering solution to be successful
- 6. A unique particle of matter that is a fundamental building block of matter