Periodic Table Crossword Puzzle

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Across
  1. 3. These can have one or two letters that represent an element.
  2. 4. This element's symbol is Ar.
  3. 6. The rows of elements on the periodic table are called _________.
  4. 7. What scientists and people call the element by is their _______.
  5. 10. The group of atoms next to the zigzag line is called __________.
  6. 11. When two or more element are chemically combined, it makes a ________.
  7. 12. The basic unit of an element is called an _________.
  8. 13. This is a pure substance that cannot be broken down into anything else.
  9. 14. This is the mass of a ny element on the periodic table.
  10. 16. The weight of an object is also called its __________.
  11. 17. The number that arranges the elements on the periodic table is called an _____.
  12. 20. This element’s atomic number is 8.
Down
  1. 1. This element’s symbol is H.
  2. 2. This element’s symbol is N.
  3. 5. A chart of elements is called the ______________.
  4. 8. The columns of the periodic table are called ________.
  5. 9. Elements found on the right side of the periodic table are called ________.
  6. 15. Everything that has mass and takes up space is _________.
  7. 18. The biggest group of elements on the periodic table is called _________.
  8. 19. This element’s atomic number is 17.