Hi dude,
Could you share your (scientific) sources? This sounds on first instance like money-making woo woo. I cannot find a single scientific paper on the topic, nor can I find any relevant evidence in bio/chemistry.

A molecule which contains only one atom is called monatomic/monoatomic, but afaik that's all it means; it applies to gases, because in metals you cannot afaik have a molecule with only one atom -what you have is just an atom; you don''t have a molecule (search: 'monatomic').

Someone has taken out a patent to include single atoms of gold in supplements. Biology can only use metallice elements in chelated form, so what metals usually do in the body (including the iron in 'iron tablets') is end up sitting in the liver for decades (if the particles are small enough to get into the bloodstream) or passing straight through the digestive system (if they are not). Accumulated metal in the system is associated with Alzheimer's and schizophrenia, so make sure you see some real evidence for how and why this works, or assume it's nonsense!

'Increasing the conductivity' of the brain and body may be achieved very quickly for free by getting wet, especially in salty water. If you want to really go for it, bathe in electrode gel and wear copper armor. You are more likely to be struck by lightning, but effects on longevity are unknown.
Best,
AR