Final answer:
The majority of an atom is empty space surrounding the nucleus due to the arrangement of protons, neutrons, and electrons.
Explanation:
Almost all of the mass of an atom comes from the total protons and neutrons in the tiny nucleus, while the majority of the atom's volume is the empty space where electrons are located in the electron cloud. In fact, accounting for the sizes of protons, neutrons, and electrons, most of an atom's volume—greater than 99 percent—is empty space. This is because the electrons, with their negative charge, repel each other due to their negative charges.
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