There is currently no scientific evidence to suggest that a human thought contains any physical mass. Thoughts are considered to be electrochemical processes that occur within the brain, involving the activity of neurons and the transmission of signals through neural networks. These processes are related to the flow of information and the organization of neural connections rather than the accumulation of physical mass.
The brain itself has a measurable mass, typically ranging from about 1.2 to 1.4 kilograms in adults. However, this mass is primarily composed of neurons, glial cells, blood vessels, and other biological components. The specific mass attributed to an individual thought or idea within the brain is not a concept that can be measured or quantified within the current scientific understanding of cognitive processes.
It's worth noting that thoughts and ideas can have significant effects on behavior, emotions, and even physical well-being, but these effects are not related to the mass of the thoughts themselves. Instead, they arise from the complex interactions between neural activity, neurotransmitters, and other physiological processes in the brain and body.