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Helium Atom
CAS: 7440-59-7 | He
2D Structure
3D Structure
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Basic Information
CAS Registry Number:
7440-59-7
Molecular Formula:
He
Molecular Weight:
4.003 g/mol
Names and Synonyms:
Helium Atom
Common Name
Atomic helium
Synonym
p-Helium
Synonym
o-Helium
Synonym
Helium-4
Synonym
Helium
Synonym
Identifiers:
SMILES:
[He]
InChI:
InChI=1S/He
Spectral Data
NMR, IR, and Mass spectral data
1H NMR
13C NMR
Failed to fetch
Note: These NMR spectra are predicted computationally and may differ from experimental data. Predictions are based on chemical environment analysis.
All Properties
Comprehensive physical and chemical properties
Physical Properties
| Property | Value | Source |
|---|---|---|
| molecular_mass | 4.00 g/mol | Legacy Database |
| density | 3.13 g/cm³ | Legacy Database |
| wikipedia_url | https://en.wikipedia.org/wiki/Helium_atom None | Legacy Database |
| cas-boiling-point | -268.9 °C None | Legacy Database |
| cas-canonical-smile | [He] None | Legacy Database |
| cas-density | 3.13 g/cm3 None | Legacy Database |
| cas-inchi | InChI=1S/He None | Legacy Database |
| cas-inchi-key | InChIKey=SWQJXJOGLNCZEY-UHFFFAOYSA-N None | Legacy Database |
| cas-melting-point | -272.2 °C None | Legacy Database |
| cas-name | Helium None | Legacy Database |
| wikipedia-name | Helium atom None | Legacy Database |
| LogP | 0.0 | RDKit |
Molecular
| Property | Value | Source |
|---|---|---|
| Molecular Weight | 4.003 g/mol | RDKit |
Exact
| Property | Value | Source |
|---|---|---|
| Exact Molecular Weight | 4.002603254 g/mol | RDKit |
Heavy
| Property | Value | Source |
|---|---|---|
| Heavy Atom Count | 1 count | RDKit |
Hydrogen
| Property | Value | Source |
|---|---|---|
| Hydrogen Bond Acceptors | 0 count | RDKit |
| Hydrogen Bond Donors | 0 count | RDKit |
Rotatable
| Property | Value | Source |
|---|---|---|
| Rotatable Bonds | 0 count | RDKit |
Aromatic
| Property | Value | Source |
|---|---|---|
| Aromatic Ring Count | 0 count | RDKit |
Topological
| Property | Value | Source |
|---|---|---|
| Topological Polar Surface Area | 0.0 Ų | RDKit |
Molar
| Property | Value | Source |
|---|---|---|
| Molar Refractivity | 0.0 | RDKit |