ion (i´on) an atom or molecule that has gained or lost one or more electrons and acquired a positive charge (a cation) or negative charge (an anion).ion´ic
dipolar ion.
ion [i´on]
dipolar ion zwitterion.
di·po·lar ion (d -p  l r)n. An ion having both a negative and a positive charge, each localized at a different point in the molecule, which thus has both positive and negative poles. Also called zwitterion. |
dipolar ion.
See zwitterion.
ion [i´on]
an atom or group of atoms having a positive (cation) or negative (anion) electric charge by virtue of having gained or lost an electron; substances forming ions are called electrolytes. adj., adj ion´ic.
dipolar ion an ion that has both positive and negative regions of charge.
hydrogen ion the positively charged hydrogen atom (H+), which is the positive ion of all acids. See also hydrogen ion concentration.
hydroxyl ion the negatively charged group, OH−, present to excess in alkaline solutions.
ion
an atom or group of atoms having a positive (cation) or negative (anion) electric charge by virtue of having gained or lost one or more electrons. Substances forming ions are electrolytes.
ion channel
see channel.
dipolar ion
zwitterion.
hydrogen ion
the positively charged hydrogen atom (H+), present to excess in acid solutions.
ion pair
the pair of ions created when an atom has had an electron removed by ionizing radiation.
ion trapping
a strategy for treatment of poisonings based on the principle that cell membranes are less permeable to ionized compounds. With knowledge of the characteristics of the toxin, treatment can be given to alter the acid-base balance in favor of ionization.
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