Across
- 2. is a reaction that can escape
- 3. is solids at room temperature
- 10. the number of protons and atom has
- 11. is the most stable and unreactive
- 14. made up of two or more substances
- 18. when two or more substances react to form a new substance
- 19. is a reaction occurred in one area
- 22. have both metal and non metal properties
- 23. 4
- 24. 5
- 25. a new substance produced in a chemical formula
Down
- 1. is an atom that has lost one or more electrons
- 4. a chemical change which absorbs heat energy
- 5. a chemical change which releases heat energy
- 6. a substance that reacts with another substance
- 7. when a material changes state
- 8. is liquids or gases at room temperature
- 9. are the most reactive especially in air or water
- 12. made up of one type of matter
- 13. 1
- 15. 3
- 16. is an atom that has gained one or more electrons
- 17. is the most reactive non metal
- 20. 6
- 21. 2