Answer: Because protons are positively charged, they will repel when in close contact with one another. Neutrons separate the protons in the nucleus. Protons and neutrons are held together by the __ D. strong__ force.
Explanation: Usually in the atom, the protons and neutrons together are the strongest because protons have a weight of 1 amu, while neutrons have a 0 amu. Electron's are the weakest because it has a weight of -1 amu.
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