ionic bond

Electrostatic attraction between oppositely charged ions in a chemical compound. Such a bond forms when one or more electrons are transferred from one neutral atom (typically a metal, which becomes a cation) to another (typically a nonmetallic element or group, which becomes an anion). The two types of ion are held together by electrostatic forces in a solid that does not comprise neutral molecules as such; rather, each ion has neighbours of the opposite charge in an ordered overall crystalline structure. When, for example, crystals of common salt (sodium chloride, NaCl) are dissolved in water, they dissociate (see dissociation) into two kinds of ions in equal numbers, sodium cations (Na+) and chloride anions (Cl). Seealso bonding; covalent bond.

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Ionic or Ionian may refer to:

In science:

  • Ion, in physics and chemistry, an atom or group of atoms with a net electric charge
    • Ionic bond, a type of chemical bond involving ions
    • Ionic compound, a chemical compound in which ions are held together in a lattice structure by ionic bonds
    • Ionic crystal, a crystal consisting of ions bound together by their electrostatic attraction
    • Ionic equation, a chemical equation in which electrolytes are written as dissociated ions
    • Ionic liquid, a liquid that essentially contains only ions
    • Ionic polarization, polarization caused by relative displacements between ions in ionic crystals
    • Ionic potential, the ratio of electric charge to the radius of an ion
    • Ionic radius, a measure of the size of an ion in a crystal lattice
    • Ionic solid, a solid are held together by ionic bonds
    • Ionic strength, a function of the concentration of all ions present in a solution
    • Ionic transfer, the transfer of ions from one liquid phase to another
  • The Middle Pleistocene, also known as the Ionian Stage, in geology

In geography:

  • Ionian Islands, seven Greek islands which lie on the eastern coast of the Ionian Sea
  • Ionian Sea, an arm of the Mediterranean Sea between Greece and Southern Italy

In ancient Greece:

  • Ionians, a people, one of the three great divisions of the ancient Greek people
  • Ionia, an ancient region in western Anatolia, in which the Ionian settlers established some colonies.
  • Ionian Revolt, a revolt by Greek Ionians against the Persian Empire
  • Ionic Greek, any of several related dialects in the ancient Greek language
  • Ionic order, one of the orders of classical architecture
  • Ionic numeral system, a certain numeral system with Greek numerals
  • Ionian School, in ancient Greek philosophy
  • Ionian mode, one of the modes in ancient Greek music

In business:

In shipping history

  • RMS Ionic, a steamship ocean liner built for the White Star Line (1883)
  • SS Ionic, a steamship ocean liner built for the White Star Line (1902)
  • SS Ionic Star, a steamship trading vessel built for the Blue Star Line (1917)

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