Across
- 4. Substance made of two or more different elements
- 6. Reaction where a single compound breaks into simpler substances
- 8. Reaction of a fuel with oxygen producing CO₂ and H₂O
- 9. Two or more atoms chemically bonded
- 11. Bond formed when electrons are transferred between atoms
- 14. Required for or released during chemical changes
- 16. Starting substance in a chemical reaction
- 17. Positively charged ion
- 18. Reaction where two or more substances combine to form one product
- 20. Charged atoms formed by gaining or losing electrons
Down
- 1. Negatively charged particle involved in bonding
- 2. Negatively charged ion
- 3. Force holding atoms together
- 5. Replacement Reaction where two compounds exchange ions
- 7. Reaction that releases heat
- 10. Replacement Reaction where one element replaces another in a compound
- 12. Bond formed by sharing electrons
- 13. Bond involving a sea of mobile electrons in metals
- 15. Substance formed in a reaction
- 19. Reaction that absorbs heat