An electron — the negatively charged particle that is part of an atom.
電子は負の電荷を持ち、原子核の周りを運動する。
Electrons carry negative charge and move around the atomic nucleus.
電子顕微鏡は電子を使って非常に小さな構造を観察する。
An electron microscope uses electrons to observe extremely small structures.
半導体中の電子の移動が電流を生む。
The movement of electrons in a semiconductor produces electric current.
Used prenominally to mean electronic — relating to devices or services that use electronic/digital technology (e.g., electronic mail).
電子メールで資料を送ります。
I'll send the materials by email.
最近は電子決済がだいぶ普及してきた。
Electronic payments have become quite widespread recently.
電子書籍は紙の本に比べて持ち運びが便利だ。
E-books are more convenient to carry compared to paper books.