Ion sizes are measured by the ionic radius. Ionic Radii in Picometers The gray color in the diagrams shows the size of the original atom. The blue (cation) and yellow (anion) shows the size of the ion. (Diagrams by Chris King.) Ionic Compounds Ionic compounds, such as sodium chloride ...
Crystals of sodium chloride, NaCl, magnified. Electric Conductivity In general, ionic solids do not carry electric current, because the ions are in fixed positions in the crystal lattice. They do, however, conduct electricity when molten or when dissolved in solution, when the ions are released ...
The covalent radius and ionic radius may be larger or smaller than the atomic radius of an atom of an element. In general, atomic radius follows atrend in the periodic tablein which the radius increases moving down an element group and decreases moving left to right across a period. Sources...
Ionic Bond Definition An ionic bond is a chemical link between twoatomscaused by theelectrostatic forcebetween oppositely-charged ions in an ioniccompound. Examples: There is an ionicbondbetween the sodium and chlorideionsin table salt, NaCl....
each other. In this context, "touching" means the outermost electron shells are in contact with each other. Theionic radiusis another method of estimating atom size. The ionic radius is half the distance between two atoms touching each other in a crystal lattice (atoms forming an ionic bond)...
Learn the definition of Chemistry and browse a collection of 993 enlightening community discussions around the topic.
Forum:Chemistry T Why is diamond stronger than metals? I know the reasons that diamonds are stronger than covalent materials and ionic compounds. The former is weaker because there are intermolecular forces and the latter is weaker because if pressure is applied like charged ions would be forced ...
: a catalyst (as triethyl-aluminum or a complex of a trialkyl-aluminum with titanium tetrachloride) that promotes an ionic type of polymerization of ethylene, propylene, or related olefins at atmospheric pressure with the resultant formation of a relatively high-melting polyethylene, a stereoregular ...
A weak, short-range attractive force between atoms or molecules caused by their dipole moments, often arising in otherwise nonpolar atoms or molecules from a temporary shift of orbital electrons to one side of one atom or molecule. [After Johannes Diderik van der Waals.] ...
Chemistry DictionaryDefinition of Ionic Bonding What is Ionic Bonding? Chemical bonds form when the total energy of the bonded atoms is lower than the total energy of the separate atoms. The form the bonding takes is determined by the electron arrangement that minimizes the energy. In some ...