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A _________ is an infinitesimal part of an atom, which is itself of course an insubstantial thing
Question

A _________ is an infinitesimal part of an atom, which is itself of course an insubstantial thing


A.

Proton 


B.

Neutron


C.

Electron


D.

Particles

Correct option is A

A proton is considered an infinitesimal part of an atom, meaning extremely small, and since an atom itself is very small, it can be described as "insubstantial".

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