Anion
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An anion (−) (/ˈænˌaɪ.ən/), from the Greek word ἄνω (ánō), meaning "up", is an ion with more electrons than protons, giving it a net negative charge (since electrons are negatively charged and protons are positively charged).
Examples: halides (fluoride, chloride, bromide, iodide), hydroxide, carbonate, sulfite, sulfate, nitrite, nitrate, phosphate, hypochlorite, chlorite, chlorate, perchlorate, azide, sulfamate, carboxylates, cyanide, etc.
