me="l00080"></a><span class="lineno">   80</span>&#160;                                              <span class="stringliteral">&#39;U1&#39;</span>,  <span class="comment"># uranium atom</span></div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;                                              <span class="stringliteral">&#39;HDZ&#39;</span>,  <span class="comment"># nitrogen molecule</span></div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;     