2021年11月20日 · 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. In chemical reactions, ions form when atoms or molecules gain or lose valence electrons.

Ions consisting of only a single atom are termed atomic or monatomic ions, while two or more atoms form molecular ions or polyatomic ions. In the case of physical ionization in a fluid (gas or liquid), "ion pairs" are created by spontaneous molecule collisions, where each generated pair consists of a free electron and a positive ion. [5]

Ions are single charged atoms (simple ions) or small charged “molecules” (polyatomic ions).” Simple ions include Na +, Ca 2+, and Cl –. Polyatomic ions include (NH 4) +, (CO 3) 2-, and …

2024年12月24日 · 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 migrate under the influence of an electrical field and are the conductors of electric current in electrolytic cells.

Positively charged ions are called cations, and negatively charged ions are called anions. Ions can be either monatomic (containing only one atom) or polyatomic (containing more than one atom).

In this tutorial, learn what an ion is, and why it is important in chemistry. An ion is an atom or molecule with either a positive or negative electrical charge. An ion has a charge because the number of protons does not equal the number of electrons; to find the number of protons and electrons, check out this article.

Atoms can, however, lose or gain electrons due to collisions or other interactions. When they do, they form charged particles called ions :

An ionic compound is made up of charged particles, called ions. It has a giant lattice structure with strong electrostatic forces of attraction. Electrically charged particle, formed when an...

Ions are formed when atoms gain or lose electrons. Ions can be positively charged (cations) or negatively charged (anions). This page titled 3.1: Ions is shared under a CC BY-NC-SA 3.0 …

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. Negatively charged ions are called anions, and positively charged ions are called cations.