Chemical Bonding and Reactions

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Across
  1. 2. A chemical bond that involves sharing a pair of electrons between atoms in a molecule
  2. 5. A substance that slows down or stops a chemical reaction
  3. 8. Formed when one or more electrons are transferred from one atom to another
  4. 9. A reaction that RELEASES energy in the form of heat
  5. 10. A chemical substance that is present at the start of a chemical reaction
  6. 12. A negatively charged ion
  7. 14. A positively charged ion
  8. 15. A reaction that ABSORBS energy in the form of heat
  9. 18. The force that holds atoms together
  10. 19. Chemical reaction in which two or more substances combine to form a new compound
Down
  1. 1. Substance that speeds up the rate of a chemical reaction
  2. 3. A chemical reaction that breaks down compounds into simpler products.
  3. 4. AB + CD --> AD + CB
  4. 6. A reaction between an acid and a base
  5. 7. Two or more atoms held together by chemical bonds
  6. 11. A + BC --> AC + B
  7. 13. A substance produced in a chemical reaction
  8. 16. A reaction of a substance with oxygen to give heat and light
  9. 17. Two or more different elements chemically combined