最終更新日：2024/07/29
The nucleus of an atom is composed of protons and neutrons, which are both nucleons.
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The nucleus of an atom is composed of protons and neutrons, which are both nucleons.
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The nucleus of an atom is composed of protons and neutrons, which are both nucleons.
The nucleus of an atom is composed of protons and neutrons, which are both nucleons.
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