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ion, any atom or group of atoms that bears one or more positive or negative electrical charges. Positively charged ions are called cations; negatively charged ions, anions.
Ions are ubiquitous in nature and are responsible for diverse phenomena from the luminescence of the Sun to the existence of the Earth's ionosphere. Atoms in their ionic state may have a different color from neutral atoms, and thus light absorption by metal ions gives the color of gemstones.
In chemistry, the definition of an ion is an electrically charged atom or molecule. This means the atom or molecule has an unequal number of protons and electrons . Neutrons carry no net electrical charge, so they don’t affect ions directly.
An ion can be defined as a chemical species which holds a positive or negative charge of some magnitude. The term ‘ion’ can be used to refer to atoms or molecules that have non-zero net charges associated with them.
Learn the definition of an ion, as used in chemistry, chemical engineering, and physics, plus review examples of ions.
Read this tutorial to learn about what an ion is, the differently charged ions, and how they are involved in different branches of chemistry!
The meaning of ION is an atom or group of atoms that carries a positive or negative electric charge as a result of having lost or gained one or more electrons. How to use ion in a sentence.
If an atom loses or gains electrons, it will become a positively or negatively charged particle, called an ion. The loss of one or more electrons results in more protons than electrons and an overall positively charged ion, called a cation.
Biology/Chemistry/Medicine definition: An ion is a charge-carrying atom or molecule with an unequal number of electrons and protons . It is formed by the process of ionization and plays several important roles in the biological world.
What is an Ion? An ion is an atom or molecule that carries an electric charge . Ions are identified by the use of a superscript to show the sign and size of their electric charge.