Periodic Table Crossword

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Across
  1. 3. This is the first element on the periodic table
  2. 5. this element is crucial for humans to survive, you also can't see it
  3. 6. Can be used to make balloons float
  4. 9. This elements name is similar to something very important in the last season of Fortnite
  5. 10. This metal does not occur naturally
Down
  1. 1. Fe is the scientific symbol for this metal
  2. 2. _ is a gas that can be used to make light
  3. 4. Is the most common metal for electric wires
  4. 7. This is the most common metal used to make nuclear energy
  5. 8. This element is the sixth most common element on earth