Aaditya's science crossword.

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Across
  1. 1. One shell can hold less than three electrons.
  2. 4. A group of elements starts with noble.
  3. 5. Gases that are stable.
  4. 7. A group of elements starts with non
  5. 11. Total number of elements in the periodic table
  6. 13. Elements in group eight have another name.
  7. 14. A group of elements starts with semi.
  8. 15. Name the element. The atomic number is seven.
  9. 16. Humans made those metals.
  10. 17. Bold alphabet in each box.
  11. 19. Name of the last row.
  12. 21. The top number in each box.
  13. 22. Name the element. The atomic number is fifty seven.
  14. 23. First element in the periodic table.
Down
  1. 1. A group of elements starts with trans.
  2. 2. They are everywhere.
  3. 3. A man made metal.
  4. 6. Another name for vertical columns.
  5. 8. A group of elements starts with alkali.
  6. 9. Name of the second last row.
  7. 10. Another name for horizontal rows.
  8. 12. They stay on the shell.
  9. 18. Name the element. The atomic number is eighty.
  10. 20. Weight of an element.