Atoms, Elements and Compounds

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Across
  1. 1. the columns on the periodic table
  2. 4. 2 or more atoms chemically joined together
  3. 6. a substance made up of only one type of atom
  4. 8. 2 or more different atoms chemically joined
  5. 9. the rows on the periodic table
  6. 10. ______________________ of mass means mass cannot be created or destroyed
  7. 13. a subatomic particle found in the nucleus that has a positive charge
Down
  1. 2. hydrogen ________________ is made when hydrogen reacts with sulfur
  2. 3. smallest particle that cannot be broken down by chemical reactions
  3. 5. magnesium ____________ is made when magnesium reacts with oxygen
  4. 7. copper _____________ is made when copper, sulfur and oxygen react together
  5. 11. a subatomic particle found in the nucleus that has no charge
  6. 12. a subatomic particle found in the outer shells that has a negative charge