The element with the atomic symbol "He" is helium. Helium is a colorless, odorless, inert gas that is the second lightest and second most abundant element in the observable universe. It was first identified in the solar spectrum during a total solar eclipse in 1868 before being found on Earth. Its applications range from filling balloons and airships to being used as a cooling medium for superconducting magnets. Helium is non-toxic and non-flammable, making it a safe choice for various uses. Its role in cryogenics and potential in future technologies continues to spark interest in scientific research.