Day 2: Interesting Facts About Helium
Atomic Symbol: He; Atomic Number: 2; Atomic Mass: 4.00260
- Helium is a colorless, odorless, tasteless, non-toxic, inert monatomic chemical element that is also nonflammable and has the lowest melting point of all of the elements.
- Helium was first detected during a solar eclipse in 1868 as a bright yellow line in the spectrum of the chromosphere of the Sun, by French astronomer Pierre Janssen . It was discovered by Sir William Ramsey in 1895.
- Helium is less dense than atmospheric air which changes the timbre of ones voice when inhaled.
- Common uses for Helium include: being a component of artificial atmospheres and laser media, refrigerant, lifting gas for balloons and airships, superfluid in cryogenic research, and reducing the effects of narcosis during deep sea diving.
Image: Vial of glowing ultrapure Helium.