Lesson 2.2 Vocabulary

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Across
  1. 3. Average mass of all isotopes of an element
  2. 5. Root word is repraesentare, which means to make present
  3. 6. One or two letters that represent the element on the periodic table
Down
  1. 1. Organized chart that includes all of the elements
  2. 2. Column in the periodic table
  3. 4. Row in the periodic table