Anion
| Formula / Notation | A^n− |
|---|---|
| Also Known As | Negative ion, electronegative ion |
What is Anion?
An anion is a negatively charged ion formed when an atom or molecule gains one or more electrons. Anions are attracted to the positively charged anode during electrolysis. Common anions include chloride (Cl⁻), sulfate (SO₄²⁻), nitrate (NO₃⁻), and hydroxide (OH⁻). Non-metals typically form anions by gaining electrons.
Formula & Notation
Other Names / Synonyms: Negative ion, electronegative ion
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
An anion is a negatively charged ion formed when an atom or molecule gains one or more electrons. Anions are attracted to the positively charged anode during electrolysis. Common anions include chloride (Cl⁻), sulfate (SO₄²⁻), nitrate (NO₃⁻), and hydroxide (OH⁻). Non-metals typically form anions by gaining electrons.
Anions are fundamental components of ionic compounds, electrolytes, and salts used across chemistry, biology, and industry. Chloride ions regulate osmotic pressure in biological systems. Sulfate and nitrate anions are essential in fertilisers. Phosphate anions are key structural components of DNA an…
Hazard varies by anion. Cyanide (CN⁻) and azide (N₃⁻) are acutely toxic. Fluoride (F⁻) is toxic at high concentrations. Nitrate and nitrite anions can be hazardous oxidising agents. Always consult the SDS for specific anion compounds before handling.
The formula or notation for Anion is: A^n−