A geometric construction (that can easily be done via compass-and-straightedge) is dynamically being illustrated below. Which construction is it?

The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic

The closer the atoms are to becoming ionic the more highly dense the negatively charged side gets.