How does an electron revolving around the nucleus look under an electron microscope?

A2A. A typical electron microscope has a resolution of around 0.1 nm, which is enough to view individual atoms. Berkeley Labs image. http://newscenter.lbl.gov/2012/07/10/ferroelectricity-on-the-nanoscale/

. This is not an image of the atom, but rather the average electromagnetic interactions between atoms and electrons. The average electromagnetic field of atoms can be felt and an image of many atoms is created in a crystal like the one shown above.

Photoionization microscopy is another technique that allows you to “see” electrons inside an atom. This is again an average of many electron-photon interactions to measure orbitals electrons. The image below shows this. Ref. http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.110.213001

Snapshots of electrons themselves inside an atom can’t be taken if quantum mechanics is an accurate model of nature (which it is).

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