20 in electron shell i think
This isn’t a answer i’m just trying to get points :)
Think of a microscope. Microscopic items/beings can only be seen under a microscope. You can also see that they would be very small, because micro = small.
B. Exosphere
Prefix "exo" means outside, or outer. So, the exosphere is the outer layer of the Earth, which is not a part of the water cycle.
Electron - In an atom, the central part which is composed of neutrons and protons including quarks is called the nucleus. Whereas the electron is the particle with negative elementary electric charge can be found inside the atom surrounding the nucleus.