ion

ion — 名詞

1. a microscopic unit consisting of one atom or several atoms bound together, which

1.名詞B2
釋義

離子

帶正電或負電的原子或分子團

a microscopic unit consisting of one atom or several atoms bound together, which becomes electrically charged whenever it gains extra electrons or loses some of its own

例句

In class, Walid drew a diagram showing how a sodium atom becomes a positive ion.

在課堂上,Walid 畫了一張圖,說明鈉原子如何變成帶正電的離子。

countable noun with 'a'

Lithium ions in a battery move from the negative toward the positive electrode during use.

鋰離子在電池中從負極移動到正極。

noun + 'ions' as subject in technical context

用法筆記

In scientific writing, the specific charge is often stated: a positive ion (cation) loses electrons, while a negative ion (anion) gains electrons. The noun is also used in compound terms such as lithium-ion battery or ion channel.

常見錯誤

An ion is the same as an atom.
An ion is an atom or group of atoms that has gained or lost electrons, giving it a charge.
💡Not all atoms are ions; only charged atoms are ions.
Salt water contains free ions just floating alone.
When salt dissolves, its crystals split into separate positive and negative ions.
💡Ions pair up in crystal form; they separate only when dissolved or melted.

ion — 縮寫

ion — 字尾