electron cloud

American  

[i-lek-trahn klaud] / ɪˈlɛk trɑn ˈklaʊd /

noun

1. a mathematically defined region surrounding the nucleus of an atom where electrons are likely to be found.

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Example Sentences

Most of the physical size of an atom is made up of an electron cloud, which hovers around the nucleus.

From Literature

Deep inside the atom, hidden far beneath the electron cloud, is the nucleus, generally composed of positively charged protons and electrically neutral neutrons.

From Literature

Since each atom is electrically neutral, the number of protons in the nucleus must exactly equal the number of electrons in the electron cloud.

From Literature

The answer is the electron cloud.

From Literature

This week, dying stars put on a light show, a volcano reawakens, and a galactic collision re-energizes an electron cloud.

From National Geographic