Abundance atomic radius

Symbol Sb atomic number 51 atomic weight 121.75 Group VA (group 15) element atomic radius 1.41A ionic radius 86 + 0.76A covalent radius 1.21A electronic configuration [Kr] 4di°5s25p3 a metalloid element electronegativity 1.82 (Allred-Rochow type) valence states +5, +3, 0 and -3 isotopes and natural abundance Sb-121 (57.3%), Sb-123 (42.7%)... 

Symbol Hf atomic number 72 atomic weight 178.49 a Group IV B (Group 4) transition metal element atomic radius 1.442A electron configuration [Xe]4/i45d26s2 common valence +4, also exhibits oxidation states +2 and -i-3 most abundant natural isotope Hf-180 isotopes and their natural abundances Hf-176 (5.21%), Hf-177 (18.56%), Hf-178 (27.10%), Hf-179 (13.75%), Hf-180 (35.22%), artificial isotopes 157, 158, 168, 173, 175, 181-183. 

Symbol He atomic number 2 atomic weight 4.0026 a Group 0 (Group 18) inert gas element second hghtest element electron configuration Is valence 0 no chemical compound known atomic radius 0.33A isotope He-3 is found in trace concentration in He-4 natural abundance of He-3 1.37 ppm short-hved radioisotopes He-5, He-6, and He-8 are known. 

Symbol Fe atomic number 26 atomic weight 55.847 a Group VIII (Group 8) metallic element transition metal atomic radius 1.24A electron configuration [Ar]3d 4s2 most common valence states +2 and -i-3 other oxidization states -1, 0, -1-1, +4 and -i-6 are known but rare most abundant isotope Fe-56 natural isotopes and their abundances Fe-54 (5.90%), Fe-56 (91.52%), Fe-57 (2.245%), Fe-58 (0.33%). 

TABLE 6.4 Properties of Alkali Metals Melting Boiling Point (°C) Point (°C) Density (g/cm3) First Ionization Energy (kj/mol) Abundance on Earth (%) Atomic Radius (pm) Ionic (M+) Radius (pm)... 

The model conceptualises the solution of (noble) gases on the microscopic level as cavities built by water molecules that trap individual (noble) gas atoms. The attracting forces between water and host increase with the atomic radius and the dielectric constant of the (noble) gas. In consequence, the intermolecular forces increase with molecular mass. This explains why the ratios of elemental noble gas concentrations in water at atmospheric equilibrium are enriched with respect to the atmospheric abundance in favor of the heavier noble gases. 

Abundance in lithosphere Abundance in sea Atomic radius rcov Atomic radius rmei... 

Symbol Density (g/cm ) mp(°C) bp(°C) vap (kj/mol) Atomic radius (A) Electronegativity" First ionization energy (kJ/mol) Relative abundance in crustal rock (order in ranking) AH° hydride (kJ/mol)... 

Abundance in lithosphere Abundance in sea Atomic radius rcov Atomic radius r et Electron shells Electronic ground state Electronic configuration Oxidation states Electron affinity Electronegativity xa 1st ionization energy 2nd ionization energy 3rd ionization energy 4th ionization energy Standard electrode potential... 

Atomic mass unit (amu), 1-1 to 11,1-23 to 26 Atomic masses, 1-14 to 17,11-56 to 253 Atomic Masses and Abundances, 1-14 to 17 Atomic Radii of the Elements, 9-49 Atomic radius, rare earth elements, 4-127 to 132... 

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