A.A.Baikov Institute of Metallurgy and Materials Science

DATABASE ON PROPERTIES OF CHEMICAL ELEMENTS
Properties of element He
PropertyValueCommentsReferences
Atomic electron scattering factor at 0.50,058 13823
Atomic environment number (Villars, Daams)12  13823
Atomic number start counting left top, left-right sequence2   
Atomic weight4,003(10-3 kg)  13823
Boiling temperature4,15
 19178
Boiling temperature4,216
 19178
Boiling temperature4,22
 13823
Boiling temperature4,37
 19178
Charge nuclear effective (Clementi)1,69 13823
Conductivity thermal0,155
 13823
Density124,8
 13823
Distance from core electron (Schubert)1,76(A) 13823
Distance from valence electron (Schubert)1,76(A) 13823
Electrochemical weight equivalent0,04147(mg*K-1)  13823
Electronegativity (Martynov&Batsanov)0,05 13823
Electronegativity absolute12,3 13823
Energy cohesive (Brewer)0,01
 13823
Energy of ionization first2372,3
 13823
Energy of ionization second5250
 13823
Enthalpy of melting0,021
 13823
Enthalpy of vaporization0,08
 19178
Enthalpy of vaporization0,082
 13823
Enthalpy of vaporization0,083
 19178
Enthalpy of vaporization0,084
 19178
Entropy of solid126,153
 20518
Entropy of solid150
 13823
Group number8 13823
Magnetic frequency of nuclei76,178 13823
Magnetic resonance32,4338(MHz)  13823
Magnetic susceptibility0,0000000059(m3*kg-1) 13823
Mass attenuation coefficient CrKα0,81(cm2*g-1)  13823
Mass attenuation coefficient FeKα0,569(cm2*g-1) 13823
Mass attenuation coefficient for CuKα0,383(cm2*g-1)  13823
Mass attenuation coefficient for MoKα0,21(cm2*g-1)  13823
Melting temperature1
 13823
Mendeleev chemists sequence89  13823
Mendeleev d-t start left103  13823
Mendeleev d-t start right6  13823
Mendeleev H d-t start left103  13823
Mendeleev H d-t start right6  13823
Mendeleev H t-d start left98  13823
Mendeleev H t-d start right1  13823
Mendeleev Pettifor1  13823
Mendeleev Pettifor regular1  13823
Mendeleev t-d start left98  13823
Mendeleev t-d start right1  13823
Molar heat capacity20,786
 13823
Moment nuclear magnetic-2,127(mu) 13823
Nuclear charge effective (Slater)1,7 13823
Oxidation state first 0 13823
Periodic number start counting bottom right, right-left sequence102  13823
Periodic number start counting left bottom, left-right sequence103  13823
Periodic number start counting top right, right-left sequence1  13823
Quantum number1 13823
Radii covalent10
 13823
Radii metal (Waber)0,8(A) 13823
Radii pseudo-potential (Zunger)0,2(a.u.) 13823
Sound velocity970(m*s-1) 13823
Spectral lines no62 13823
Spin nuclei0,5(h) 13823
Thermal neutron capture cross section0,007(barns) 13823
Valence electron number8 13823
Volume of atom (Villars, Daams)1,906(10-2 nm3)  13823