An electron bubble is the empty space created around a free electron in a cryogenic gas or liquid, such as neon or helium. They are typically very small, about 2 nm in diameter at atmospheric pressure.
Read more about Electron Bubble: Electron Bubbles in Helium, Electron Repulsion From The Surface of Helium, The 2S Electron Bubble, Footnotes
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“No bubble is so iridescent or floats longer than that blown by the successful teacher.”
—Sir William Osler (1849–1919)
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