Helium Informationen, einschließlich Technische Daten, Safety Data und seine Eigenschaften, Forschung, Anwendungen und andere nützliche Fakten sind erörtert werden. Wissenschaftliche Fakten, wie die atomare Struktur, Ionisierungenergie, Fülle auf der Erde, Leitfähigkeit und thermischen Eigenschaften sind im Preis inbegriffen.
Helium ist ein Block S, Gruppe 18, Periode 1 Element. Die elektronische Konfiguration 1s Helium wurde von Pierre Jules César Janssen und Sir William Ramsay im Jahre 1868.
Helium Abundance. The following table shows the abundance of helium and each of its naturally occurring isotopes on Earth along with the atomic mass for each isotope. |
Hélium 
Helium
Elio 
Hélio 
Helio 
HeliumIsotope |
Atomic Mass |
% Abundance on Earth |
He-3 |
3.016029310 |
0.01 |
He-4 |
4.002603250 |
99.99 |
Helium Safety Data. The safety data for helium metal, nanoparticles and its compounds can vary widely depending on the form. For potential hazard information, toxicity, and road, sea and air transportation limitations, such as DOT Hazard Class, DOT Number, EU Number, NFPA Health rating and RTECS Class, please see the specific material or compound referenced in the left margin.
Ionisation Energie. Die Ionisierungenergie für helium (die am wenigsten Energie benötigt, um ein einzelnes Elektron aus dem Atom in seinem Grundzustand in der Gasphase) ist in der folgenden Tabelle dargestellt: |
1st Ionization Energy |
708.58 kJ mol-1 |
2nd Ionization Energy |
1411.81 kJ mol-1 |
3rd Ionization Energy |
2943.07 kJ mol-1 |
Conductivity. As to helium's electrical and thermal conductivity, the electrical conductivity measured in terms of electrical resistivity @ 20 ºC is - µOcm and its electronegativities (or its ability to draw electrons relative to other elements) is -. The thermal conductivity of helium is 0.155 W m-1 K-1.
Thermal Properties of Helium. The melting point and boiling point for helium are stated below. The following chart sets forth the heat of fusion, heat of vaporization and heat of atomization. |
Heat of Fusion |
0.021 kJ mol-1 |
Heat of Vaporization |
0.082 kJ mol-1 |
Heat of Atomization |
0 kJ mol-1 |
| Formula | Atomic Number | Molecular Weight | Electronegativity (Pauling) | Density | Melting Point | Boiling Point |
Vanderwaals radius |
Ionic radius | Energy of first ionization |
| He | 2 | 4.002602 g.mol -1 | - | 0.08988 g.cm-3 | -272.2 °C | -268.93 °C | .120 nm | 128pm | 708.58 kJ.mol-1 |
| PRODUCT CATALOG | German Operations | Submicron & Nanopowder | Tolling | Ultra High Purity | Sputtering Target | Crystal Growth | Rod, Plate, Powder, etc. | Foil |
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