ass="n">atomic_numbers</span><span class="p">)</span>
        <span class="k">if</span> <span class="ow">not</span> <span class="n">zs</span><span class="o">.</span><span class="n">issubset</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_atomic_number_set</span><span class="p">):</span>
            <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span>
                <span class="s2">&quot;The following atomic numbers are n