Electron spin and the Pauli principle
Each electron spins and acts like a tiny magnet; two electrons sharing an orbital must have opposite spins (shown as up and down arrows), so their magnetic effects cancel.
The idea, in English
Each electron spins and acts like a tiny magnet; two electrons sharing an orbital must have opposite spins (shown as up and down arrows), so their magnetic effects cancel.
Explain in Egyptian Arabic
كل electron بيعمل spin، فبيتصرّف كأنه مغناطيس صغير. ولو اتنين electrons في نفس الـ orbital، لازم يكون ليهم opposite spins (بنرسمهم سهم لفوق وسهم لتحت)، وعشان كده التأثير المغناطيسي بتاعهم بيلغي بعضه.