A tiny particle in the nucleus of an atom that is about the same size as a proton is a(n) A. electron
B. neutron
C. solid
D. element ​

b. neutron.

Explanation:

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B. Neutron

Explanation:

Neutrons are about the same size as protons. In addition, nuclei are made up of neutrons and protons. Electrons are located in the electron cloud, which is outside of the nucleus. Solids are hard matter, and an element is a substance that cannot be broken down any further.

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