Across
- 3. a negatively charged ion, the result of gaining one or more electrons
- 5. a positively charged ion, the result of losing one or more electrons
- 6. energy
- 7. a PH of 7
- 8. when organic molecules burn
- 10. a solid substance that forms when two liquids are mixed
- 12. are negative
- 15. substances that form n a chemical reaction
- 16. can be divided into 2 groups
- 18. a substance that can accept hydrogen ions
Down
- 1. a chemical substance that neutralizes alkis
- 2. provide evidence that a chemical reaction might have taken place
- 4. a change when a substance changes to a new substance
- 6. energy is absorbed from the surroundings
- 8. have 2 or more different elements in a proportion
- 9. cannot be created or destroyed
- 10. a change where the properties do not change
- 11. explaining an observation in terms of previous experience
- 12. found in the periodic table
- 13. substances that undergo change in a chemical reaction
- 14. appear to be one substance but is a combination
- 17. is lost or gained in every chemical reaction