Across
- 5. cells in your body that contain biological catalysts
- 6. acid that wear away materials
- 7. a solid that forms from solution during reaction
- 9. compounds whose characteristic properties include the kinds of reactions they undergo
- 10. compounds breaking into simpler products
- 12. a change of form or appearance of a substance
- 14. the minimum energy that is needed to start an reaction
- 16. a compound that consists of positive and negative ions
- 18. a range of values from 0 to 14
- 20. a mixture that contains a solvent and solute
Down
- 1. a mixture of a metal and another element
- 2. a neutral group of atoms joined by covalent bonds
- 3. covalent bond with unequally shared electrons
- 4. substance that undergo changes in a chemical reaction
- 8. the total making and breaking of bonds result in a net of release of energy
- 11. a new substances formed by a reaction
- 13. a solution that has a pH of 7
- 15. a material that releases energy when it burns
- 17. the study of matter and how it changes
- 19. atom or atoms with an electric charge