Periodic Table 2

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Across
  1. 3. element with highest electron affinity
  2. 4. Arrangement of elements in order of increasing atomic number
  3. 5. Positively charged ion
Down
  1. 1. Metals are on which side of the periodic table
  2. 2. First scientist to arrange elments in tabular form
  3. 4. Horizontal row in the periodic table