The Periodic Table

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Across
  1. 2. Columns in a periodic table.
  2. 6. There are ... known elements on the periodic table.
  3. 8. Element with the chemical symbol of Na
  4. 9. The man who invented the periodic table
  5. 10. Rows in a periodic table.
  6. 12. There are ... non-metals in the first 20 elements of the periodic table
  7. 13. ... atoms has the highest mass
Down
  1. 1. The heaviest element
  2. 3. There are ... metals in the first 20 elements of the periodic table
  3. 4. The atoms of the elements increase in ... as you read across each row.
  4. 5. What do we call the table that shows all the elements?
  5. 7. One or Two letters that represent an element.
  6. 11. Number of protons an atom contains