The Periodic Table

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Across
  1. 2. There are ... non-metals in the first 20 elements of the periodic table
  2. 3. Rows in a periodic table.
  3. 5. The first element on the periodic table is Helium. (TRUE/FALSE)
  4. 7. Columns in a periodic table.
  5. 10. Element with the atomic number of 5
  6. 13. There are ... known elements on the periodic table.
  7. 14. The chemical symbol of lead is
  8. 15. There are ... metals in the first 20 elements of the periodic table
  9. 16. What do we call the table that shows all the elements?
  10. 17. The atoms of the elements increase in ... as you read across each row.
  11. 18. ... atoms has the highest mass
  12. 19. (TRUE/FALSE)
Down
  1. 1. Elements in the same column share similar chemical and ... properties.
  2. 4. The heaviest element
  3. 6. Number of protons an atom contains
  4. 8. The man who invented the periodic table
  5. 9. Element with the chemical symbol of Na
  6. 11. One or Two letters that represent an element.
  7. 12. If there is a second letter in the chemical symbol, it is always ....
  8. 17. Chemical symbol of magnesium