anion

anion — 名詞

1. an atom or small group of atoms that carries a negative electric charge because

1.名詞C2
釋義

陰離子

帶負電荷的離子

an atom or small group of atoms that carries a negative electric charge because it has gained one or more extra electrons.

例句

In a salt solution, chloride anions move toward the positive electrode during electrolysis.

在鹽類溶液中，氯離子（陰離子）會在電解過程中朝正極移動。

domain context: anions in electrolysis

When a chlorine atom picks up one extra electron, it becomes an anion with a negative charge.

氯原子多得到一個電子後，就會變成帶負電的陰離子。

mechanism: gaining an electron forms an anion

同義詞
  • negative ion

    everyday wording for the same particle; preferred outside specialist writing.

反義詞
  • cation

    the matching term for a positively charged ion.

文法句型

anion of [element/compound]

用法筆記

Almost always used in chemistry contexts. Frequently paired with its opposite, 'cation' (positive ion), and named after the element or group involved (e.g. chloride anion, sulfate anion).

常見錯誤

❌Sodium becomes an anion when it loses an electron.
✅Sodium becomes a cation when it loses an electron.
💡atoms that lose electrons form cations (positive); atoms that gain electrons form anions (negative).
❌The anion moves to the negative electrode.
✅The anion moves to the positive electrode (the anode).
💡opposite charges attract, so the negatively charged anion is pulled toward the positive side.