週期粵拼zau1 kei4英文:period),或者叫元素週期,係元素週期表入面打橫嘅行,伊家元素週期表有8個週期。同一個週期入面嘅元素有一樣嘅電子殼數目。

Wikiwand in your browser!

Seamless Wikipedia browsing. On steroids.

Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.

Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.