This element is the final product of the triple alpha process.
This element is the final product of the triple alpha process. Temperatures below zero-point-three Kelvin can be achieved by exploiting the heat of mixing of two isotopes of this element in a dilution fridge. One form of this element can creep up the walls of the container it is held in to form a Rollin film. The diatomic form of this element with a charge of plus-one can exist hypothetically with a bond order of one half. It was first observed as a bright yellow emission line at 587 nanometers coming from the chromosphere of the sun. Below the lambda point, this element exhibits superfluid behavior. An alpha particle consists of the nuclei of this element. For 10 points, name this second lightest element.
This element is the final product of the triple alpha process.
helium [accept He]