• Anion is the name of the ion with a charge of -1.
• Anions are atoms or molecules that have gained one or more electrons, resulting in a net negative charge.
• Anions form when neutral atoms or molecules acquire additional electrons. This typically occurs with nonmetals, which have higher electronegativities and a tendency to attract electrons.
○ Chloride ion (Cl⁻): Formed when a chlorine atom gains one electron.
○ Hydroxide ion (OH⁻): Comprises one oxygen and one hydrogen atom, carrying an extra electron.
○ Nitrate ion (NO₃⁻): A polyatomic ion consisting of nitrogen and oxygen atoms, with an overall negative charge
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