Update README.md

Signed-off-by: Fabiana 🚀  Campanari <113218619+FabianaCampanari@users.noreply.github.com>

Author: FabianaCampanari

README.md

@@ -305,6 +305,11 @@ Ramanujan's deep insights into infinite series and modular forms continue to inf
 
 ### 8. [Niels Bohr]() (1913)   <br> ──────────────  
 
+   * Bohr's atomic model with quantized energy levels.
+
+   Formula for the energy levels of an electron in a hydrogen atom:  
+  
+