diff --git a/education/chemistry/1.html b/education/chemistry/1.html
index 9e76a07..cdcf045 100644
--- a/education/chemistry/1.html
+++ b/education/chemistry/1.html
@@ -2,7 +2,7 @@
 title: 1
 description: 
 published: true
-date: 2026-02-11T15:57:59.376Z
+date: 2026-02-11T16:02:17.712Z
 tags: 
 editor: ckeditor
 dateCreated: 2026-02-11T14:58:54.870Z
@@ -20,13 +20,13 @@ dateCreated: 2026-02-11T14:58:54.870Z
       </tr>
       <tr>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Electron</span></td>
-        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">e-</span></td>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">e<sup>-</sup></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;">5.4858 x 10<sup>-4</sup></span></td>
       </tr>
       <tr>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Proton</span></td>
-        <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;">p<sup>+</sup></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;">1.0073</span></td>
       </tr>
@@ -61,7 +61,7 @@ dateCreated: 2026-02-11T14:58:54.870Z
     <tbody>
       <tr>
         <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>
+        <td style="text-align:center;width:100px;"><span style="font-family:Arial, Helvetica, sans-serif;"><strong>Max e<sup>-</sup></strong></span></td>
       </tr>
       <tr>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">1</span></td>
@@ -93,7 +93,7 @@ dateCreated: 2026-02-11T14:58:54.870Z
       <tr>
         <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:100px;"><span style="font-family:Arial, Helvetica, sans-serif;"><strong>Max e<sup>-</sup></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>
@@ -574,4 +574,35 @@ dateCreated: 2026-02-11T14:58:54.870Z
   </table>
 </figure>
 <p>&nbsp;</p>
+<h3><span style="font-family:Arial, Helvetica, sans-serif;">Isoelectronic</span></h3>
+<p><span style="font-family:Arial, Helvetica, sans-serif;">If they have the same number of electrons</span></p>
+<p>&nbsp;</p>
+<figure class="table">
+  <table>
+    <tbody>
+      <tr>
+        <td style="text-align:center;width:150px;"><span style="font-family:Arial, Helvetica, sans-serif;">&nbsp;</span></td>
+        <td style="text-align:center;width:200px;"><span style="font-family:Arial, Helvetica, sans-serif;"><strong>Name</strong></span></td>
+      </tr>
+      <tr>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Na<sup>+</sup></span></td>
+        <td style="text-align:center;" rowspan="3"><span style="font-family:Arial, Helvetica, sans-serif;">10e<sup>-</sup></span></td>
+      </tr>
+      <tr>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Mg<sup>2+</sup></span></td>
+      </tr>
+      <tr>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">N<sup>3-</sup></span></td>
+      </tr>
+      <tr>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">S<sup>2-</sup></span></td>
+        <td style="text-align:center;" rowspan="2"><span style="font-family:Arial, Helvetica, sans-serif;">18e<sup>-</sup></span></td>
+      </tr>
+      <tr>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Cl<sup>-</sup></span></td>
+      </tr>
+    </tbody>
+  </table>
+</figure>
+<p>&nbsp;</p>
 <p>&nbsp;</p>