Chemistry Crossword Puzzle

12345678910111213141516171819202122
Across
  1. 2. synthesis always forms solids
  2. 3. Most reactive nonmetals
  3. 4. elements tend to be stable with eight valence electrons
  4. 7. Conduct electricity and heat
  5. 8. ion with a negative charge e- are gained
  6. 11. used in a balanced chemical equation
  7. 13. Columns on the periodic table
  8. 15. most comment element in the universe
  9. 16. ion with a positive charge e- are lost
  10. 17. allows us to change/convert between two units
  11. 18. atom or molecule that has a charge becasue it has gained or lost electrons
  12. 19. Rows on the periodic table
  13. 21. Very reactive
  14. 22. subatomic particles that have a negative charge
Down
  1. 1. electrons are shared
  2. 5. another name for percent yield
  3. 6. the smallest particle thats made up of matter
  4. 9. is a unit of concentration for solutions that is frequently used in chemistry
  5. 10. shows only the substances that undergo a change
  6. 12. 1/12 the mass of a carbon-12 isotope
  7. 14. properties of elements repeat as a result of being ordered by atomic number
  8. 20. an atom with the same number of protons but a different number of neutrons