Chemistry Crossword Puzzle

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Across
  1. 5. The most common ____________ is created by the IUPAC.
  2. 6. 6Mg + P4 → 2Mg3P2 is an example of a __________ equation.
  3. 11. Humans release ________________ when they breathe out.
  4. 13. _________________ is an ionic compound also known as table salt.
  5. 15. __________ is a molecular compound that contains one carbon atom and four hydrogen atoms.
  6. 18. B2H4 is an example of a _______ bond.
  7. 19. The _____________ diagram shows the amount of electrons on an element's last shell.
  8. 20. A ________________ is used to tell you which chemicals are reacting with each other.
Down
  1. 1. _________ is the first element in the halogen group.
  2. 2. _______ compounds are made of non-metals.
  3. 3. A ________________ uses the formulas to show which elements were used to create the chemical reaction.
  4. 4. Oxygen has a ________ of 2.
  5. 7. Sodium carbonate is an example of a _______ bond.
  6. 8. An ______ dissolves in water to release hydrogen ions in aqueous solutions.
  7. 9. ________ is when 2 or more reactants combine to form 1 product.
  8. 10. ___________ is when a reactant is broken down into two or more products.
  9. 12. A ______ dissolves in water to release hydroxide ions in aqueous solutions.
  10. 14. When light is produced, a chemical _________ has taken place.
  11. 16. NH4+ is an example of a ____________ ion.
  12. 17. A ________ compound consists of exactly 2 elements.