Across
- 2. the smallest unit of most compounds that displays all the properties of that compound
- 4. a substance formed by the chemical combination of two or more elements in definite proportions
- 5. negatively charged particle; located in the space surrounding the nucleus
- 10. a solution with a pH less than 7
- 12. a solution with a pH greater than 7
- 13. the force of attraction between different kinds of molecules
- 14. fats, oils and waxes
- 15. basic unit of matter
- 16. type of protein that speeds up chemical reactions in living things
Down
- 1. a type of mixture in which all the components are evenly distributed
- 3. a pure substance that consists entirely of one type of atom
- 6. sugars and starches
- 7. polymer built from amino acids
- 8. the energy that is needed to get a chemical reaction started
- 9. the attraction between molecules of the same substance
- 11. a substance that speeds up the rate of a chemical reaction