WebElements Periodic Table of the Elements | Periodicity | Covalent radii revisited (2008 values) | periodicity

	covalent radii revisited (2008 values) This is a set of covalent atomic radii (Ref. 1) deduced from crystallographic data for most of the elements with atomic numbers up to 96. These data show a well behaved periodic dependence that allowed interpolation for a few elements for which structural data is lacking, notably the noble gases. These values remove some inconsistencies in earlier covalent radii values. Additional graphs for these data will appear shortly. Units pm Notes None Literature sources Beatriz Cordero, Verónica Gómez, Ana E. Platero-Prats, Marc Revés, Jorge Echeverría, Eduard Cremades, Flavia Barragán and Santiago Alvarez, in "Covalent radii revisited", Dalton Trans., 2008, [DOI: 10.1039/b801115j]. WebElements Shop WebElements now has an online shop at which you can buy periodic table posters, mugs, T-shirts, games, molecular models, and more.
Periodicity		Search WebElements Search Chemistry Web Custom Search Essential data Essential data: name, symbol, atomic number, and atomic weight; block, period, group number, and group name in periodic table; description; standard state; registry number; and isolation History: meaning of name; discovery; and history of the element Find a property The elements round us Uses Geology: Abundance of elements in the universe; the sun; meteorites; Earth's crust; oceans; and streams Biology: abundance in humans; biological role; and health hazards Compounds Compounds: halides, oxides, sulfides, hydrides, and complexes; lattice energies; and reduction potentials Electronegativities: Pauling; Sanderson; Allred-Rochow; Mulliken-Jaffe; and Allen Bond enthalpies of diatomic species Lattice energies: oxides and halides Element properties Physics properties: boiling point; melting point; density; and molar volume; thermal conductivity; and electrical resistivity; bulk modulus; critical temperature; superconductivity temperature; hardness (mineralogical, Brinell, and Vickers); linear expansion coefficient; Poisson's ratio; reflectivity; refractive index; rigidity modulus; Young's modulus; and velocity of sound Images Allotropes Reactions of : reactions with air; water; halogens; acids; and bases Crystal structure Thermochemistry: enthalpies of atomisation, fusion, and vaporisation, thermodynamic properties Atom properties Electronic properties: electronic configuration; term symbol; electron affinity; ionisation energies; and atomic spectra Atom sizes: atomic radii; Shannon and Pauling Ionic radii; covalent radius; metallic radius; element bond length; and Van der Waals radius Electron shell properties: effective nuclear charge; electron binding energies; and valence orbital radii maxima Nuclear properties Isotopes: isotope abundances; radioactive isotopes; isotope masses; nuclear spins; and nuclear magnetic moments NMR properties: frequencies; NMR isotopes; magnetogyric ratios; quadrupole moments; receptivities; and relative sensitivities Books Chemistry Books (CA) Chemieb�cher (DE) Livres de chimie (FR) Medical Bookshop (UK) Medical Bookstore (USA) Physics Bookshop (UK) Biology Bookshop (UK) Law, Business, and Finance Bookshop (UK) Scientific book store (USA) Scientific book store (UK)