Across
- 4. a material composed of two or more elements or compounds that are physically mixed
- 5. smallest unit of most compounds
- 7. substance in which the solute dissolves
- 10. compounds of carbon, hydrogen, and oxygen atoms
- 11. indicates H+ ions in solution
- 15. when moving electrons travel about the nuclei of both atoms
- 17. macromolecules containing hydrogen, oxygen, nitrogen, carbon, and phosphorus
- 18. elements or compounds that enter into a chemical reaction
- 19. attraction between molecules of different subtances
- 20. attraction between molecules of the same substance
Down
- 1. substance consisting entirely of one type of atom
- 2. macromolecules that contain nitrogen, carbon hydrogen, and oxygen
- 3. weak acids or bases that can react with strong acids or bases
- 6. energy needed to start a chemical reaction
- 8. Basic unit of matter
- 9. compound that produces hydroxide ions in solution
- 12. substance formed by the combination of two or more elements
- 13. group of biological molecules not soluble in water
- 14. single sugar molecules
- 16. at center of atom