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Electrons (symbol: e) are subatomic particles with a negative elementary electric charge.

 Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure.

The electron has a mass that is approximately 1/1836 that of the proton. Quantum mechanical properties of the electron include an intrinsic angular momentum (spin) of a half-integer value in units of ħ, which means that it is a fermion.

Being fermions, no two electrons can occupy the same quantum state, in accordance with the Pauli exclusion principle.

Electrons also have properties of both particles and waves, and so can collide with other particles and can be diffracted like light. Experiments with electrons best demonstrate this duality because electrons have a tiny mass.                                                                

note: There is no picture of an electron because you can't really 'see' an electron.

mass of electron is 0.5109989461(31) MeV/c2


Here are a few explanations with the help of ChatGPT

explain an electron like a valley girl

Oh my gosh, like, an electron is like this tiny little thing that's, like, super important in atoms and stuff. It's like, negative and stuff, and it's like, in the electron cloud and it's like, involved in all these science-y things. Like, chemical reactions and electricity, you know? It's just, like, so cool and tiny and important.

more details from Valley Girl

explain an electron like a wild western character

An electron is like a wanted outlaw on the run. It's got a negative charge and it's always on the move, just like a cowboy on a wild frontier. Just like how a cowboy is always looking for a new frontier to explore, an electron is always looking for a new atom to call home. The electron cloud is like the wild west, a place where anything can happen. Just like how the wild west was a place of discovery and adventure, the electron is always discovering new ways to interact with other atoms and create chemical reactions and electricity.