Here's why this is relevant to the octet rule:
* The Octet Rule: Atoms tend to gain, lose, or share electrons to achieve a stable electron configuration with eight electrons in their outermost shell (like noble gases).
* Sodium's Situation: Sodium only has one electron in its outermost shell (3s¹). To achieve a stable octet, it's much easier for sodium to *lose* that one electron. When it loses this electron, it becomes a positively charged ion (Na⁺) with a full outer shell (2s², 2p⁶) like neon (Ne).
In summary, sodium doesn't follow the octet rule in its neutral state, but it does achieve a stable octet configuration by forming a positive ion.