Helium atom
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A helium atom is an atom of the chemical element helium. Helium is composed of two electrons bound by the electromagnetic force to a nucleus containing two protons along with two neutrons, depending on the isotope, held together by the strong... Wikipedia
3D model (JSmol): Interactive image
ATC code: V03AN03 (WHO)
Boiling point: −269 °C (−452.20 °F; 4.15 K)
Gmelin Reference: 16294
Std molar entropy (S⦵298): 126.151-126.155 J K−1 mol−1
UN number: 1046