An atom or molecule that has lost or gained one or more electrons, and thus has an electric charge. Positively charged ions are cations, because they migrate towards the cathode (negative pole) in solution, while negatively charged ions (anions) migrate towards the positive pole (anode).
An atom or molecule possessing a positive or a negative electrical charge. Ions are produced by the dissociation (coming-apart) of (electrolyte) molecule resulting from electrolyte dissolving in solution. One example is the dissociation of common table salt (i.e., sodium chloride) in water, which results in positively charged sodium ions (called cations) and negatively charged chloride ions (called anions). Ions play critically important roles in may biological processes such as nerve activity.
A charged particle.
An ion is a charged molecule. Ions with negative charges are called anions. Those with positive charges are called cations. Electrolytes in solutions are examples of ions.
An electrically charged particle. A negatively charged ion has acquired one or more additional electrons, whereas a positively charged ion has relinquished one or more electrons.
An individual atom or a cluster of atoms that attains an electrical charge through the process of gaining or losing electrons.
An ion is a particle with an electrical charge. Cations are positively charged ions, while anions are negatively charged. The movement of ions across cell membranes is crucial for several essential bodily functions, including nerve impulse transmission. Sodium, the main cation in the fluid surrounding cells (extracellular fluid), plays a significant role in regulating water flow in and out of cells, thus determining the fluid concentration in the body.
The blood and body fluids’ acidity hinges on the amount of hydrogen cations produced during metabolism. To keep these fluids from becoming overly acidic, hydrogen cations are counteracted by bicarbonate anions in the blood and the fluid outside cells, as well as by phosphate anions within cells.