Challenge It Unit 8

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Across
  1. 2. cannot be divided
  2. 4. molecule made up of on type of atom
  3. 7. table with all the elements
Down
  1. 1. group of atoms chemically bonded together
  2. 3. one or two letters representing an element
  3. 5. the rows in the periodic table
  4. 6. the columns in the periodic table