A.A.Baikov Institute of Metallurgy and Materials Science

DATABASE ON PROPERTIES OF CHEMICAL ELEMENTS
Properties of element Ra
PropertyValueCommentsReferences
Atomic electron scattering factor at 0.53,46 13823
Atomic environment number (Villars, Daams)14  13823
Atomic number start counting left top, left-right sequence88  13823
Atomic weight226,025(10-3 kg)  13823
Boiling temperature1413
 13823
Charge nuclear effective (Clementi)9 13823
Compression modulus0,132(GPa)  13823
Conductivity thermal18,6
 13823
Density5000
 13823
Distance from core electron (Schubert)1,48(A) 13823
Distance from valence electron (Schubert)3,45(A) 13823
Electrochemical weight equivalent1,17124(mg*K-1)  13823
Electron affinity50
 13823
Electronegativity (Alfred-Rochow)0,97 13823
Electronegativity (Martynov&Batsanov)0,9 13823
Electronegativity (Pauling)0,9 13823
Electronegativity absolute2,2 13823
Energy cohesive (Brewer)1,66
 13823
Energy of ionization first509,1
 13823
Energy of ionization second975
 13823
Energy of ionization third3281
 13823
Enthalpy of atomization159
 13823
Enthalpy of melting8,5
 13823
Enthalpy of vaporization136,7
 13823
Entropy of solid71,1756
 13823
Group number2 13823
Magnetic frequency of nuclei5 13823
Magnetic resonance1(MHz)  13823
Mass attenuation coefficient for MoKα120(cm2*g-1)  13823
Melting temperature973
 13823
Mendeleev chemists sequence9  13823
Mendeleev d-t start left8  13823
Mendeleev d-t start right91  13823
Mendeleev H d-t start left7  13823
Mendeleev H d-t start right92  13823
Mendeleev H t-d start left12  13823
Mendeleev H t-d start right97  13823
Mendeleev Pettifor13  13823
Mendeleev Pettifor regular14  13823
Mendeleev t-d start left13  13823
Mendeleev t-d start right96  13823
Molar heat capacity25,76
 13823
Moment nuclear magnetic1(mu) 13823
Nuclear charge effective (Slater)1,65 13823
Oxidation state first 2 13823
Periodic number start counting bottom right, right-left sequence16  13823
Periodic number start counting left bottom, left-right sequence2  13823
Periodic number start counting top right, right-left sequence102  13823
Quantum number7 13823
Radii covalent200
 13823
Radii metal (Waber)2,26(A) 13823
Radii pseudo-potential (Zunger)3,53(a.u.) 13823
Resistivity electrical100(10-8 Ohm*m)  13823
Spectral lines no127 13823
Spin nuclei3(h) 13823
Thermal neutron capture cross section20(barns) 13823
Valence electron number2 13823
Vapour pressure at Tm327(N*m-2) 13823
Volume of atom (Villars, Daams)6,822(10-2 nm3)  13823
Work function3,2(eV)  13823
PropertyC.N.Radii ionic (Shannon)CommentsReferences
Ra+2121,700 Å13826
Ra+281,480 Å13826
PropertyValueCommentsReferences
Radii ionic (Bokii & Belov)
Ra+21,440 Å 13824
Radii ionic (Goldsmidt)
Ra+21,520 Å 13824
Radii ionic (Yagoda)
Ra+21,340 Å 13824