Do electrons age? (Beginner)

Do electrons age? If electron do age, then how can you tell how old the electron is?

No, electrons do not age. There is no way to tell how old an electron is, since all electrons are exactly identical to one another. The same is true for any other kind of elementary particle; even particles which eventually decay into other particles decay instantaneously.

This page was last updated on December 11, 2015.

About the Author

Dave Kornreich

Dave was the founder of Ask an Astronomer. He got his PhD from Cornell in 2001 and is now an assistant professor in the Department of Physics and Physical Science at Humboldt State University in California. There he runs his own version of Ask the Astronomer. He also helps us out with the odd cosmology question.