“Nuclear” comes from “nucleus”, which is a biology term that designs the central part of a cell. And yes, as surprising as it may sound, it was a term in biology first!
That term comes from the latin ‘nux’, which means ‘inner part’.
We actually refer to the ‘nucleus of the atom’, to be accurate, which is why the term was taken from the biology concept.
There’s not really much I can add to what Thomas and Becky have said here about the word ‘nucleus’, so I’ll tell you a cool fact about the word ‘atom’.
Atom comes from the latin ‘atomus’ which came from the greek word ‘atomos’ and means indivisible, or cannot be divided. This is because they originally thought that atoms were the smallest things around. We then found out that they are made up of protons and neutrons with electrons around the outside. A bit later we found out that protons and neutrons are actually made up of three quarks! At the moment, we think that quarks are the smallest things around and cannot be divided, but who knows? We’ve been wrong before! Maybe there’s something *even* smaller that we haven’t found yet.
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