“However you mention suddhātthaka aren’t electrically charged, which means suddhātthaka is another sort of particle possibly outside of the standard model.”
Yes. Science is still far away from “getting the whole picture”.
“By the way, where does the suddhātthaka scale come from? Is it explicitly mentioned in Tipitaka?”
Yes. It is not in the suttas. It is in Abhidhamma Piṭaka. I need to spend some time at some point in getting to those details.
– But discussing Paticca Samuppada has priority. That is what is done in the “Origin of Life” series.