Across
- 2. A reaction of a substance with oxygen to give heat and light.
- 4. A chemical reaction that releases heat causing the heat in its environment to rise.
- 7. Reaction in which an atom or ion loses electrons.
- 9. Formed when 2 elements share valence electrons.
- 10. Substance formed in a chemical reaction.
- 11. When 2 ions are created, 1 loses an electron and another gains one, ex: NaCl.
- 12. Substance that reacts with another substance in a chemical reaction.
Down
- 1. Process where substances react with each other and form new substances with different properties.
- 3. Substance consisting of more than one element.
- 5. Chemical compound with oxygen.
- 6. A chemical reaction that absorbs heat and cools down its environment.
- 8. Brown, crumbly chemical compound formed when iron reacts with oxygen and water.