Canina‭ Isn't electron, proton and positron noun? First later of noun is forever capital. But, in your suggestion it was small letter why?

deleted user Nouns aren't written with an initial capital letter in English; however, proper names are. (With a few exceptions, such as names of units, which may or may not be capitalized; for example, Newton and Sievert are capitalized when used as the name of the unit, but gram and second are not, and prefixes are generally uncapitalized so 1 Sievert is 1000 millisievert.) However, some languages do capitalize nouns; German is one example I know of, but I am sure there are others. If you'd like a more in-depth discussion of this, I suggest asking over on Languages & Linguistics.

Also, I wasn't quite sure what you meant with your last paragraph (and especially the final parenthetical), so I largely left that one alone. For example, I don't know what you meant to say by "is it mattering for charge?". You might want to consider if that can be edited to clarify what you are asking about.