  An equation that determines the numbers of electrons for molecules is
proposed based on chemical common sense. It shows that all molecules are
entangled in number of electrons and results in the fundamental assumption of
molecular energy convexity that underpins molecular quantum mechanics. It also
leads to the concept of fractional numbers of electrons for molecules in a
statistical sense. The energy of a molecule is piecewise linear with respect to
its continuous number of electrons. Wavefunction interpretation of this
equation of nature shows that an individual molecule with noninteger number of
electrons is locally physical albeit locally unreal. The complete theoretical
proof of the equation is still to be had.
