Elements & Compounds

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Across
  1. 5. The chemical symbol He
  2. 6. One or two letters used to represent an element
  3. 8. The chemical symbol Mg
  4. 12. A single substance without anything mixed in
  5. 13. Easily broken
  6. 14. An attractive force that holds two atoms together
  7. 18. The number by which elements are ordered in the periodic table
  8. 19. A repeating arrangement of atoms in a solid
  9. 21. A column in the periodic table
Down
  1. 1. C6H12O6
  2. 2. An element that typically does not conduct heat or electricity
  3. 3. A group of atoms bonded together
  4. 4. The chemical symbol Cl
  5. 7. A substance made up of two or more types of atom bonded together
  6. 9. A shiny element that conducts heat and electricity
  7. 10. The re-arrangement of atoms to form one or more new substances
  8. 11. A grid arrangement of all known chemical elements
  9. 15. A substance made up of only one type of atom
  10. 16. The temperature at which a substance changes from liquid to gas
  11. 17. The temperature at which a substance changes from solid to liquid
  12. 20. The chemical symbol Na