Chemical Elements

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Across
  1. 3. The rarest element in the universe
  2. 6. An essential element for human survival
  3. 7. Helps to transport oxygen from lungs to all parts of the body
  4. 8. This metal is the softest compared to other metals in the periodic table
  5. 9. The only metal in liquid state at room temperature
  6. 10. The most abundant element in the universe by mass
Down
  1. 1. The most radioactive element
  2. 2. This element is the first of the noble gases
  3. 4. The element with the highest boiling point
  4. 5. This gas makes up about 78% of the Earth's atmosphere