check_atomic_numbers</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">atomic_numbers</span><span class="p">):</span>
<span class="w">        </span><span class="sd">&quot;&quot;&quot;Used to check that the given atomic numbers have been defined for</span>
<span class="sd">        this descriptor.</span>

<span class="sd">        Args:</span>
<span class="sd">            species(iterable): Atomic numbers to check.</span>

<span class="sd">        Raises:</spa