diff --git a/education/chemistry/1.html b/education/chemistry/1.html
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@@ -2,7 +2,7 @@
 title: 1
 description: 
 published: true
-date: 2026-02-11T15:12:28.295Z
+date: 2026-02-11T15:19:54.989Z
 tags: 
 editor: ckeditor
 dateCreated: 2026-02-11T14:58:54.870Z
@@ -56,13 +56,14 @@ dateCreated: 2026-02-11T14:58:54.870Z
 <p>&nbsp;</p>
 <h3><span style="font-family:Arial, Helvetica, sans-serif;">Electronic arrangement</span></h3>
 <p><span style="font-family:Arial, Helvetica, sans-serif;">The maximum number of electron that a shell can hold is 2(n)<sup>2</sup></span></p>
+<p><span style="font-family:Arial, Helvetica, sans-serif;">For example, Cl-17,&nbsp;instead of written 2, 8, 7, we can write more clearly with 2, 2+6, 2+5, that is 1s<sup>2</sup> 2s<sup>2</sup> 2p<sup>6</sup> 3s<sup>2</sup> 3p<sup>5</sup></span></p>
 <p>&nbsp;</p>
 <figure class="table">
   <table>
     <tbody>
       <tr>
-        <td style="text-align:center;width:100px;"><span style="font-family:Arial, Helvetica, sans-serif;">n</span></td>
-        <td style="text-align:center;width:100px;"><span style="font-family:Arial, Helvetica, sans-serif;">max</span></td>
+        <td style="text-align:center;width:100px;"><span style="font-family:Arial, Helvetica, sans-serif;"><strong>N</strong></span></td>
+        <td style="text-align:center;width:100px;"><span style="font-family:Arial, Helvetica, sans-serif;"><strong>Max e-</strong></span></td>
       </tr>
       <tr>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">1</span></td>
@@ -86,42 +87,77 @@ dateCreated: 2026-02-11T14:58:54.870Z
 <p>&nbsp;</p>
 <h3><span style="font-family:Arial, Helvetica, sans-serif;">Electronic configuration</span></h3>
 <p><span style="font-family:Arial, Helvetica, sans-serif;">There are subshells inside the shell.</span></p>
+<p>&nbsp;</p>
 <figure class="table">
   <table>
     <tbody>
       <tr>
-        <td style="text-align:center;width:100px;"><span style="font-family:Arial, Helvetica, sans-serif;">Subshell</span></td>
-        <td style="text-align:center;width:100px;"><span style="font-family:Arial, Helvetica, sans-serif;">Orbitals</span></td>
-        <td style="text-align:center;width:100px;"><span style="font-family:Arial, Helvetica, sans-serif;">Max</span></td>
-        <td style="text-align:center;width:200px;"><span style="font-family:Arial, Helvetica, sans-serif;">Name</span></td>
-        <td style="text-align:center;width:300px;"><span style="font-family:Arial, Helvetica, sans-serif;">Quantum Number</span></td>
+        <td style="text-align:center;width:100px;"><span style="font-family:Arial, Helvetica, sans-serif;"><strong>Subshell</strong></span></td>
+        <td style="text-align:center;width:100px;"><span style="font-family:Arial, Helvetica, sans-serif;"><strong>Orbitals</strong></span></td>
+        <td style="text-align:center;width:100px;"><span style="font-family:Arial, Helvetica, sans-serif;"><strong>Max e-</strong></span></td>
+        <td style="text-align:center;width:200px;"><span style="font-family:Arial, Helvetica, sans-serif;"><strong>Name of orbital</strong></span></td>
+        <td style="text-align:center;width:200px;"><span style="font-family:Arial, Helvetica, sans-serif;"><strong>Historical Name</strong></span></td>
       </tr>
       <tr>
-        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">n</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">s</span></td>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">1</span></td>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">2</span></td>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">s</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Sharp</span></td>
+      </tr>
+      <tr>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">p</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">3</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">6</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">p<sub>x</sub>, p<sub>y</sub>, p<sub>z</sub></span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Principal</span></td>
+      </tr>
+      <tr>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">d</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">5</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">10</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">d<sub>xy</sub>, d<sub>xz</sub>, d<sub>yz</sub>, d<sub>x<sup>2</sup>-y<sup>2</sup></sub>, d<sub>z<sup>2</sup></sub></span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Diffuse</span></td>
+      </tr>
+      <tr>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">f</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">7</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">14</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">&nbsp;</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Fundamental</span></td>
+      </tr>
+      <tr>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">g</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">9</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">18</span></td>
+        <td style="text-align:center;">&nbsp;</td>
+        <td style="text-align:center;">&nbsp;</td>
+      </tr>
+    </tbody>
+  </table>
+</figure>
+<p>&nbsp;</p>
+<figure class="table">
+  <table>
+    <tbody>
+      <tr>
+        <td style="text-align:center;width:100px;"><span style="font-family:Arial, Helvetica, sans-serif;"><strong>Orbitals</strong></span></td>
+        <td style="text-align:center;width:300px;"><span style="font-family:Arial, Helvetica, sans-serif;"><strong>Quantum Number</strong></span></td>
+      </tr>
+      <tr>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">n</span></td>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">&nbsp;Principal</span></td>
       </tr>
       <tr>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">l</span></td>
-        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">3</span></td>
-        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">6</span></td>
-        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">p<sub>x</sub>, p<sub>y</sub>, p<sub>z</sub></span></td>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Angular Momentum</span></td>
       </tr>
       <tr>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">m</span></td>
-        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">5</span></td>
-        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">10</span></td>
-        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">d<sub>xy</sub>, d<sub>xz</sub>, d<sub>yz</sub>, d<sub>x<sup>2</sup>-y<sup>2</sup></sub>, d<sub>z<sup>2</sup></sub></span></td>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Magnetic</span></td>
       </tr>
       <tr>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">s</span></td>
-        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">7</span></td>
-        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">14</span></td>
-        <td style="text-align:center;">&nbsp;</td>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Spin</span></td>
       </tr>
     </tbody>