Periodicity

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Across
  1. 5. What metals are in group 2A w/ 2+ charge?
  2. 6. What metals are in group 7A w/ 1- charge?
  3. 7. What determines the number of valence electrons; the vertical rows
Down
  1. 1. What metals are in group 1A w/ 1+ charge?
  2. 2. What metals are in group 8A w/ 0 charge?
  3. 3. What metals are in group B?
  4. 4. What determines the number of energy levels; the horizontal rows