PERIODIC TABLE

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Across
  1. 3. Substance that resists electricity
  2. 6. Column in the periodic table
  3. 7. Row in the periodic table
  4. 8. They have properties between metals and nonmetals
Down
  1. 1. ... electrons - electrons in outer energy level of an atom
  2. 2. Amount of energy required to remove the most loosely bound electron
  3. 4. Consists of protons and neutrons
  4. 5. Creator of the periodic table