Langford class 3

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Across
  1. 5. I make balloons float
  2. 6. Atomic number is 3
  3. 8. The periodic table is made up of
  4. 9. The lightest element
Down
  1. 1. How many elements are on the periodic table
  2. 2. The sight for this is k
  3. 3. Number 18 on the table
  4. 4. A shiny liquid that can burn you
  5. 7. Atomic number for silver
  6. 10. a valuable yellow element