The Periodic Table

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