The Periodic Table

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