diff --git a/content/scripts/python/python_pubchem-periodic-table.ipynb b/content/scripts/python/python_pubchem-periodic-table.ipynb
index 55a2700..28d65a2 100644
--- a/content/scripts/python/python_pubchem-periodic-table.ipynb
+++ b/content/scripts/python/python_pubchem-periodic-table.ipynb
@@ -20,7 +20,7 @@
     "\n",
     "These recipe examples were tested on February 23, 2024.\n",
     "\n",
-    "**_NOTE:_** The PubChem limits requests to a maximum of 5 request per second."
+    "**_NOTE:_** The PubChem limits requests to a maximum of 5 requests per second."
    ]
   },
   {