Periodic Table

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Across
  1. 6. Elements in staircase
  2. 9. Branch of science periodic table is in
  3. 10. Number of elements on periodic table
  4. 11. First artificially made element
  5. 16. Elements right of staircase
  6. 18. Numbers of protons and neutrons
  7. 20. Equal to atomic number
Down
  1. 1. An element exists as diatomic molecule
  2. 2. It gives identity to an atom
  3. 3. The syllable of the letters which are present in the Periodic table
  4. 4. Vertical columns on periodic table
  5. 5. Number of periods on the periodic table
  6. 7. Elements left of staircase
  7. 8. Horizontal row on periodic table
  8. 12. Number of groups on the periodic table
  9. 13. First element in periodic table
  10. 14. Letter in the middle of each box in the periodic table
  11. 15. What the periodic table is made of
  12. 17. Last element in periodic table
  13. 19. Number of liquid on the periodic table