ATOMICNUCLEUS

Atomic nucleus

The nucleus is the very dense region consisting of protons and neutrons at the center of an atom. It was discovered in 1911 as a result of Ernest Rutherford's interpretation of the 1909 Geiger–Marsden gold foil experiment performed by Hans Geiger and Ernest Marsden under Rutherford's direction. The proton–neutron model of nucleus was proposed by Dmitry Ivanenko in 1932. Almost all of the mass of an atom is located in the nucleus, with a very small contribution from the electron cloud.

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atomic nucleus

Noun

  1. A nucleus of an atom; consisting of protons and neutrons, surrounded by an electron cloud.


The above text is a snippet from Wiktionary: atomic nucleus
and as such is available under the Creative Commons Attribution/Share-Alike License.

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