Nomenclature Crossword Puzzle

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Across
  1. 2. What element always has the prefix in a binary compound?
  2. 4. what is the suffix in binary compounds?
  3. 5. What is a binary compound also known as?
  4. 8. What is a compound made up of three elements called?
  5. 9. What subatomic particle is positive?
  6. 11. What do we use to signify the oxidation state in a compound?
  7. 12. What tells us the composition of a formula?
  8. 13. What is NaCl?
  9. 15. What is CaO?
  10. 18. What is the system of naming chemical formulas called?
  11. 19. What is on the right of the staircase on the periodic table?
  12. 20. What subatomic particle is negative?
Down
  1. 1. What part of a chemical formula tells us how many of an atom?
  2. 3. What is the charge of an element called?
  3. 6. What is a compound made up of two elements called?
  4. 7. What is a compound made up of two non-metals called?
  5. 10. What is the charge of a free element?
  6. 14. What subatomic particle has no charge?
  7. 16. How are binary compounds bonded?
  8. 17. What is on the left of the staircase on the periodic table?