Across
- 3. substance composed of two or more elements
- 5. water molecules are attracted to other substances
- 7. a solution that resists changes in pH when acid is added to it
- 9. water molecules are attracted to other water molecules
- 10. substance made by an enzyme from its substrate
- 11. substance made of one type of atom
- 13. bond chemical bond between oppositely charged ions
- 14. bond bond between a hydrogen atom and a negatively charged atom
- 16. molecule has both a positively and negatively charged end
- 17. having a pH of less than 7
Down
- 1. basic unit of an element
- 2. energy amount of energy required for a chemical reaction
- 4. electron electron that can form a chemical bond
- 6. particle with a neutral charge in an atom
- 8. group of atoms bonded together
- 12. protein molecule that is a biological catalyst
- 15. starting substance in a chemical reaction
- 16. positively charged particle in an atom