Neutrons are electrically neutral but they still interact electromagnetically (they&#x27;re composed of charged quarks). They have a magnetic moment, for instance [1]. So they wouldn&#x27;t be dark the way &quot;dark matter&quot; appears (heh) to be.<p>[1] - <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Neutron_magnetic_moment" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Neutron_magnetic_moment</a>