Are Atoms Lopsided in Weight Based on Neutron and Proton Placement?

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The placement of neutrons and protons within an atom is not fixed, as they move relative to each other inside the nucleus. Neutrons and protons occupy the nucleus, while electrons exist in orbitals around it. The concept of polarity does not determine weight distribution within the atom. There are no definite boundaries for the nucleus or the atom, only probable locations for these particles. Overall, the structure of an atom is dynamic and lacks a lopsided weight distribution based on particle placement.
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Just curious if we know what the placement of neutrons and protons are within an atom? Is one side heavier, can we determine this from polarity?
 
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The neutrons and protons are near the middle.
 
The neutrons and protons occupy the nucleus, while the electrons form "orbitals" around the nucleus.

http://en.wikipedia.org/wiki/Atom
 
The placement of neutrons and protons is not fixed within the nucleus. Nucleons move relative to each other inside the nucleus (which is near the middle) much the way electrons orbit the nucleus while remaining inside the atom. There is no definite boundary for either the nucleus or the atom as a whole. There are only locations where you will probably find the particles.
 

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