Update app.py

app.py

@@ -42,6 +42,8 @@ def main():
     st.set_page_config(page_title="Chemistry Instructor", page_icon="⚖️")
     st.header("ChatGPT Based Chemistry Assistant")
     st.markdown(css_code, unsafe_allow_html=True)
+    st.components.v1.iframe("https://pubchem.ncbi.nlm.nih.gov/periodic-table/#view=table&embed=true", style="width: 100%; height: 1000px;", scrolling=True)
+
     with st.sidebar:
         st.write("---")
         st.image("hydrogen.jpg")