diff --git a/education/chemistry/1.html b/education/chemistry/1.html
index eed10cd..1f7cfac 100644
--- a/education/chemistry/1.html
+++ b/education/chemistry/1.html
@@ -2,7 +2,7 @@
 title: 1
 description: 
 published: true
-date: 2026-02-11T15:48:58.466Z
+date: 2026-02-11T15:50:25.348Z
 tags: 
 editor: ckeditor
 dateCreated: 2026-02-11T14:58:54.870Z
@@ -444,6 +444,41 @@ dateCreated: 2026-02-11T14:58:54.870Z
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">NH<sub>4</sub><sup>+</sup></span><br><span style="font-family:Arial, Helvetica, sans-serif;">(Polyatomic)</span></td>
         <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Ammonium ion</span></td>
       </tr>
+      <tr>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">H<sup>+</sup></span></td>
+        <td>&nbsp;</td>
+        <td>&nbsp;</td>
+      </tr>
+      <tr>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Cu<sup>+</sup></span></td>
+        <td>&nbsp;</td>
+        <td>&nbsp;</td>
+      </tr>
+      <tr>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Cu<sup>2+</sup></span></td>
+        <td>&nbsp;</td>
+        <td>&nbsp;</td>
+      </tr>
+      <tr>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Fe<sup>2+</sup></span></td>
+        <td>&nbsp;</td>
+        <td>&nbsp;</td>
+      </tr>
+      <tr>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Fe<sup>3+</sup></span></td>
+        <td>&nbsp;</td>
+        <td>&nbsp;</td>
+      </tr>
+      <tr>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Ni<sup>2+</sup></span></td>
+        <td>&nbsp;</td>
+        <td>&nbsp;</td>
+      </tr>
+      <tr>
+        <td style="text-align:center;"><span style="font-family:Arial, Helvetica, sans-serif;">Cr<sup>3+</sup></span></td>
+        <td>&nbsp;</td>
+        <td>&nbsp;</td>
+      </tr>
     </tbody>
   </table>
 </figure>