Across
- 4. The first element on the periodic table, with the atomic number 1.
- 7. Essential for respiration and found in the air we breathe.
- 8. Valued for its luster and conductivity, used in jewelry and electronics.
- 10. Produces a bright orange-red glow in neon signs.
Down
- 1. Commonly used in construction and as a key component of hemoglobin.
- 2. Known as the building block of life, found in all organic compounds.
- 3. Used to disinfect water and in the production of PVC.
- 5. Highly prized for its beauty and rarity, used in jewelry and currency.
- 6. Used to fill balloons and as a coolant in MRI machines.
- 9. Reacts explosively with water and commonly found in table salt.