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docs: update education/chemistry/1

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2026-02-11 15:36:14 +00:00
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@@ -2,7 +2,7 @@
title: 1 title: 1
description: description:
published: true published: true
date: 2026-02-11T15:34:58.131Z date: 2026-02-11T15:36:13.726Z
tags: tags:
editor: ckeditor editor: ckeditor
dateCreated: 2026-02-11T14:58:54.870Z dateCreated: 2026-02-11T14:58:54.870Z
@@ -382,5 +382,10 @@ dateCreated: 2026-02-11T14:58:54.870Z
<p><span style="font-family:Arial, Helvetica, sans-serif;">The electronic configuration of Cr (Chromium) and Cu (Copper) do not follow the order. The outer subshell become half or fully filled to gain extra stability.</span></p> <p><span style="font-family:Arial, Helvetica, sans-serif;">The electronic configuration of Cr (Chromium) and Cu (Copper) do not follow the order. The outer subshell become half or fully filled to gain extra stability.</span></p>
<p><span style="font-family:Arial, Helvetica, sans-serif;">It is also because that 4s and 3d energy difference is small.</span></p> <p><span style="font-family:Arial, Helvetica, sans-serif;">It is also because that 4s and 3d energy difference is small.</span></p>
<p>&nbsp;</p> <p>&nbsp;</p>
<h3><span style="font-family:Arial, Helvetica, sans-serif;">Periodic table groups</span></h3>
<p><span style="font-family:Arial, Helvetica, sans-serif;">Group 1 - Alkali metal</span></p>
<p><span style="font-family:Arial, Helvetica, sans-serif;">Group 2 - Alkaline earth metal</span></p>
<p><span style="font-family:Arial, Helvetica, sans-serif;">Group 17 (7) - Halogen</span></p>
<p><span style="font-family:Arial, Helvetica, sans-serif;">Group 18 (8) - Noble gas</span></p>
<p>&nbsp;</p> <p>&nbsp;</p>
<p>&nbsp;</p> <p>&nbsp;</p>