Getting PCB boards made is literally dirt cheap ... you should now have a basic idea of how to take a simple chemical formula to a Lewis structure, and vice versa. For a more advanced look ...

Atomic structure Atoms are made from protons ... are held together by chemical bonds, either sharing or gaining/losing electrons. Chemical formulae The chemical formula for a substance shows ...

The chemical formula of a covalent molecular substance gives the number of atoms per molecule. The formula of a covalent network or ionic compound gives the simplest ratio of atoms/ions in the ...