* Electrons are the most mobile: Electrons are much lighter than protons and neutrons, making them easier to move around. They also occupy energy levels around the nucleus, which allows them to change energy levels and jump around relatively freely.
* Protons and neutrons are bound within the nucleus: While protons and neutrons can vibrate and move within the nucleus, they are held together by the strong nuclear force, which is incredibly powerful. This makes them much less mobile than electrons.
* Electrons are involved in chemical reactions: Electrons are the primary players in chemical bonds and reactions. Their movement is what allows atoms to interact with each other. This leads to the impression that they are the only particles moving.
In summary: While electrons are the most mobile subatomic particles and play a crucial role in chemical reactions, all subatomic particles have the capacity to move. It's just that the movement of protons and neutrons is more limited and less obvious.
