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Words related to helium

he·li·um
H h

  • helium ii

    liquid helium existing as a superfluid below the lambda point of 2.186 K, having very low viscosity and very high thermal conductivity.

  • lambda point

    the temperature of approximately 2.186 K, at which the transition from helium I to superfluid helium II occurs.

  • alpha particle

    a helium-4 nucleus, containing two neutrons and two protons, emitted during some radioactive transformations

  • americium

    a white metallic transuranic element artificially produced from plutonium. It is used as an alpha-particle source. Symbol: Am; atomic no: 95; half-life of most stable isotope, 243Am: 7.4 × 103 years; valency: 2,3,4,5, or 6; relative density: 13.67; melting pt: 1176°C; boiling pt: 2607°C (est)

  • antihelium

    the antimatter counterpart to helium.

  • atmophile

    (of a chemical element in the earth) having an affinity for the atmosphere, as neon or helium.
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