rescale the image

mkdocs.yml

@@ -61,6 +61,7 @@ markdown_extensions:
   - toc:
       permalink: True
   - admonition
+  - attr_list
   - pymdownx.details
   - pymdownx.extra
   - abbr

src/5_atoms_and_lcao.md

@@ -96,7 +96,7 @@ Quantum numbers:
 
 Below is an illustration of several lowest energy orbitals in hydrogen:
 
-[![Hydrogen atomic orbitals](https://upload.wikimedia.org/wikipedia/commons/5/5c/Atomic_orbitals_n123_m-eigenstates.png)](https://commons.wikimedia.org/wiki/File:Atomic_orbitals_n123_m-eigenstates.png#/media/File:Atomic_orbitals_n123_m-eigenstates.png)
+[![Hydrogen atomic orbitals](https://upload.wikimedia.org/wikipedia/commons/5/5c/Atomic_orbitals_n123_m-eigenstates.png)](https://commons.wikimedia.org/wiki/File:Atomic_orbitals_n123_m-eigenstates.png#/media/File:Atomic_orbitals_n123_m-eigenstates.png){: style="width:50%"}
 
 (image source: Wikipedia © Geek3 CC-BY-SA)