section 5.3

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Across
  1. 3. one of the metals that can use the inner shell before using the outer shell to bond
  2. 6. one of the elements of Group 1 of the periodic table
Down
  1. 1. one of the elements of Group 2 of the periodic table
  2. 2. one of the elements of Group 18 of the periodic table
  3. 4. All elements with atomic numbers greater than 92 are [...], or made in a laboratory.
  4. 5. one of the elements of Group 17 of the periodic table
  5. 7. what is the only metal that is liquid in room temperature?