diff --git a/education/chemistry/1.html b/education/chemistry/1.html
index ac5169a..f11372e 100644
--- a/education/chemistry/1.html
+++ b/education/chemistry/1.html
@@ -2,7 +2,7 @@
 title: 1
 description: 
 published: true
-date: 2026-02-11T15:36:13.726Z
+date: 2026-02-11T15:38:17.754Z
 tags: 
 editor: ckeditor
 dateCreated: 2026-02-11T14:58:54.870Z
@@ -388,4 +388,6 @@ dateCreated: 2026-02-11T14:58:54.870Z
 <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><span style="font-family:Arial, Helvetica, sans-serif;">Noble gases are stable in atomic form because the outermost shell are fully filled.</span></p>
+<p><span style="font-family:Arial, Helvetica, sans-serif;">Other element tend to lose, gain or share electron to achieve nearest fully filled electronic structure, that is duplet or octet structure.</span></p>
 <p>&nbsp;</p>