Anion Here

: When an atom gains an electron, it becomes an anion.

: The number of electrons gained is indicated by a superscript after the chemical symbol (e.g., Cl−cap C l raised to the negative power for a gain of one electron, O2−cap O raised to the 2 minus power for a gain of two). : When an atom gains an electron, it becomes an anion

Anions are typically formed by . According to the octet rule , atoms often gain electrons until their outermost shell is full, typically containing eight electrons. This process is driven by the atom's electronegativity—its ability to attract and hold onto electrons. According to the octet rule , atoms often

: In simple monoatomic anions, the ending of the element's name is typically replaced with "-ide". For example, chlorine becomes chloride ( Cl−cap C l raised to the negative power ) and oxygen becomes oxide ( O2−cap O raised to the 2 minus power Common Examples For example, chlorine becomes chloride ( Cl−cap C

Anions exist in various forms, from simple atoms to complex molecular groups: Cation vs Anion: Definitions & Periodic Table Guide