RESULT: "He" is the chemical symbol for **Helium. **
Helium is the second simplest element.
Helium is a "rare" or "noble" gas.
When inhaled, helium leads to a high-pitched voice.
Helium is stable and lighter than air, two properties which make it the natural choice for filling balloons.
Helium can be supercooled down to a few millionths of one degree.