Helium - ₂He: physical properties

Density properties

• density of the chemical elements displayed on a miniature periodic tableDensity of solid: 214 kg m^‑3
• molar volume of the chemical elements displayed on a miniature periodic tableMolar volume: 21.00 cm³

Elastic properties

• Young's modulus of the chemical elements displayed on a miniature periodic tableYoung's modulus: (no data) GPa
• Rigidity modulus of the chemical elements displayed on a miniature periodic tableRigidity modulus: (no data) GPa
• bulk modulus of the chemical elements displayed on a miniature periodic tableBulk modulus: (no data) GPa
• Poisson's ratio of the chemical elements displayed on a miniature periodic tablePoisson's ratio: (no data) (no units)

Hardnesses

• mineral hardness of the chemical elements displayed on a miniature periodic tableMineral hardness: (no data) (no units)
• Brinell hardness of the chemical elements displayed on a miniature periodic tableBrinell hardness: (no data) MN m^-2
• Vickers hardness of the chemical elements displayed on a miniature periodic tableVickers hardness: (no data) MN m^-2

Electrical properties

• electrical resistivity of the chemical elements displayed on a miniature periodic tableElectrical resistivity: (no data) × 10^‑8 Ω m; or mΩ cm

Heat and conduction

• Thermal conductivity of the chemical elements on a miniature periodic table spark tableThermal conductivity: 0.1513 W m^‑1 K^‑1
• coefficient of linear expansion of the chemical elements displayed on a miniature periodic tableCoefficient of linear thermal expansion: (no data) × 10^‑6 K^‑1

Optical properties

• reflectivity of the chemical elements displayed on a miniature periodic tableReflectivity: (no data) %
• refractive index of the chemical elements displayed on a miniature periodic tableRefractive index: 1.000035 (gas; liquid 1.028) (no units)

Acoustic properties

• velocity of sound of the chemical elements displayed on a miniature periodic tableVelocity of sound: 970 m s^‑1