Shows the oxidation states of nitrogen and summarizes standard reduction potentials in volts. Top diagram shows acid solution at pH 0; bottom shows basic solution at pH 14.
<p>Original Diagram: Norman N. Greenwood and Alan Earnshaw
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Vectorization by <a href="//commons.wikimedia.org/wiki/User:AntiCompositeNumber" title="User:AntiCompositeNumber">AntiCompositeNumber</a>
Vector version of diagram from <cite class="book" style="font-style:normal" id="Reference-Greenwood-1997">Greenwood, Norman N (1997)      <i> Chemistry of the Elements</i>, Butterworth-Heinemann, pp. 437  <small><a href="https://en.wikipedia.org/wiki/International_Standard_Book_Number" class="extiw" title="en:International Standard Book Number">ISBN</a>:  <a href="//commons.wikimedia.org/wiki/Special:BookSources/0-08-037941-9" title="Special:BookSources/0-08-037941-9">0-08-037941-9</a>. </small></cite>