Positively charged ions are called cations. Ions with positive charges have donated the electrons in their outermost shells to electronegative atoms that tend to attract electrons. More » Science Chemistry Atoms & Molecules

An atom with no charge becomes positively charged when it loses an electron. When this happens, it is called a positive ion. If the atom gains an electron, the atom becomes a negative ion. In either case, the number of p... More » Science Chemistry Atoms & Molecules

Positively charged atomic particles are called protons. These particles, along with neutrons, exist in the nucleus of the atom. Protons and neutrons each have an atomic mass of one. More » Science Chemistry Atoms & Molecules
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Metals form positive ions, or cations. According to the octet rule, because metals have relatively few electrons in their outermost energy levels, they tend to lose these electrons to form compounds with other elements. ... More » Science Chemistry Atoms & Molecules

Ions form electrically neutral compounds because the number of cations (positively charged ions) is equal to the number of anions (negatively charged ions). These ions are held together by strong electrostatic forces of ... More » Science Chemistry Atoms & Molecules

An anion gap refers to the difference between the concentration of positively charged ions, known as cations and negatively charged ions, known as anions, in a liquid. The anion gap is often measured as part of medical t... More » Science Chemistry Organic Chemistry

Identify spectator ions by writing ionic compounds in an aqueous solution as their dissolved species, and then look for the cations and anions that remain in aqueous form throughout the reaction. According to Chemlab, sp... More » Science Physics Particle Physics