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Across
  1. 3. Elements on the left of the periodic table
  2. 5. Atom with a different number of neutrons
  3. 7. Which period of the periodic table corresponds with Sodium (NA).
  4. 8. Which group of the periodic table corresponds with the noble gases.
  5. 9. LI
  6. 10. Atom with a different number of electrons
  7. 11. The element with one proton
Down
  1. 1. CU
  2. 2. Metalloid at the top of the staircase
  3. 3. The elements that touch the zigzag line (staircase) on the Periodic Table
  4. 4. Which group of the periodic table corresponds with the Alkali Earth Metals.
  5. 6. BR