Which argument best explains the charge of an atomic nucleus? an atomic nucleus is positively charged because it is composed of neutrons. an atomic nucleus is positively charged because it is composed of protons. an atomic nucleus is negatively charged because it is composed of electrons. an atomic nucleus is negatively charged because it is composed of neutrons.

An atomic nucleus is positively charged because it is composed of protons.

Explanation:

The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment. After the discovery of the neutron in 1932, models for a nucleus composed of protons and neutrons were quickly developed by Dmitri Ivanhoe Werner Heisenberg. An atom is composed of a positively-charged nucleus, with a cloud of negatively-charged electrons surrounding it, bound together by electrostatic force. Almost all of the mass of an atom is located in the nucleus, with a very small contribution from the electron cloud. Protons and neutrons are bound together to form a nucleus by the nuclear force.

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Explanation:

The best answer is "An atomic nucleus is positively charged because it is composed of protons." But it is not exactly correct as the nucleus is composed of protons and neutrons (except for Hydrogen which only has a proton.) But the neutrons are electrically neutral so the nucleus' positive charge is due to its protons.

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