Unit 2

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Across
  1. 2. The smallest part of a chemical element.
  2. 4. Group 7 of the periodic table
  3. 6. Group 8 of the periodic table
  4. 9. Are the electrons found in the outermost energy level of an atom.
Down
  1. 1. Two or more different atoms chemically joined together
  2. 2. Group 1 of the periodic table
  3. 3. Horizontal rows on the periodic table
  4. 5. One or two letter code to identify the elements
  5. 7. Vertical columns on the periodic table
  6. 8. The repeating patterns of properties when arranged by increasing atomic number.