In a completely closed system with heavy or heavier ions than iron, the stability of the nuclei without any electrons would depend on the specific properties of those nuclei.
In general, the stability of a nucleus is determined by the balance between the strong nuclear force, which holds the protons and neutrons together, and the electrostatic repulsion between the protons. The presence of electrons does not directly affect the stability of the nucleus, as their primary role is in the atomic structure and the overall electrical neutrality of the atom.
However, the absence of electrons can indirectly impact the stability of heavy nuclei through the process of electron capture. Electron capture is a nuclear decay process in which an electron from the surrounding environment is absorbed by a proton in the nucleus, converting it into a neutron. This process can help stabilize nuclei by reducing the number of protons and reducing the electrostatic repulsion.
In some cases, heavy nuclei may undergo spontaneous radioactive decay due to their inherent instability. This decay can involve various processes, such as alpha decay, beta decay, or fission, depending on the specific nuclear properties.
It's important to note that without electrons, the system would lack electrical neutrality, potentially leading to strong electrostatic interactions between the positively charged ions. These interactions could affect the overall stability and behavior of the system.
In summary, the stability of heavy nuclei without electrons in a closed system would depend on the specific nuclear properties, including the balance between the strong nuclear force and electrostatic repulsion, as well as potential decay processes and other factors.