Unit 1 Crossword Puzzle

1234567891011121314151617
Across
  1. 6. Iron
  2. 10. Shows the elements that make up the compound and the numbers of atoms
  3. 14. Sodium or Potassium
  4. 15. Neutral charge
  5. 16. Atoms with different numbers of neutrons
  6. 17. Elements with similar properties
Down
  1. 1. Hydrogen
  2. 2. Group of atoms with a negative charge
  3. 3. Horizontal rows of the periodic table
  4. 4. Group of atoms that have any charge
  5. 5. Group of atoms with a positive charge
  6. 7. Number of protons in an element
  7. 8. One or two letter abbreviations for a chemical element name
  8. 9. Helium
  9. 11. Positive charge
  10. 12. Number of protons and neutrons combined
  11. 13. Negative charge