Chemistry Crossword Puzzle

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Across
  1. 2. This element makes up pencil lead
  2. 4. This is group one on the periodic table
  3. 5. This type of bond is formed when atoms give or take electrons from one another
  4. 6. The positive particle found in the nucleus
  5. 9. I can't function without this in the morning
  6. 11. The 118 elements are organized by atomic number on this
  7. 12. The more common name for sodium chloride
  8. 14. This type of bond occurs when atoms share electrons
  9. 16. When atoms gain or lose electrons, they become _____
  10. 17. number of protons in the atom
  11. 18. Your absolute, most favorite class this year
  12. 19. Also called dihydrogen monoxide, this substance is required for life
  13. 20. This compound is found when you breathe out
Down
  1. 1. This element is used in toothpaste to make your teeth stronger
  2. 3. The weight of an element is its _________
  3. 7. The negative particle in the atom
  4. 8. This metal in period 4 explodes when put into water
  5. 10. This Russian scientist is given credit for arranging the periodic table
  6. 13. The particle in an atom responsible for isotopes
  7. 15. The small particles that make up everything
  8. 16. Also known as the charge of an atom