The weight of an atom of dark matter is not precisely known because dark matter has not been directly detected or fully characterized. Dark matter is a hypothetical form of matter that does not interact with light or other forms of electromagnetic radiation, making it challenging to observe and measure directly.
However, based on current theories and models, dark matter is believed to be composed of non-baryonic particles, meaning it is not made up of the same particles as ordinary matter. Ordinary matter, which includes atoms, consists of protons, neutrons, and electrons.
The mass of an atom primarily depends on the number of protons and neutrons it contains. Since dark matter is thought to consist of particles different from those in ordinary matter, it is expected that the mass of a dark matter particle would be different from that of a normal atom. The exact mass of a dark matter particle is uncertain and subject to ongoing research and investigation.
Various hypothetical particles have been proposed as potential dark matter candidates, such as Weakly Interacting Massive Particles (WIMPs) or axions, but their masses are not precisely determined. Some dark matter models suggest that dark matter particles could be heavier than ordinary particles, while others propose lighter masses.
In summary, the weight of an atom of dark matter cannot be definitively stated since dark matter particles have not been directly observed or characterized. The mass of a dark matter particle, if it exists, would likely differ from that of a normal atom due to the different composition and nature of dark matter.