- RealQM can serve as a constructive foundation of chemistry, whereas Standard QM cannot.
1. H₂ bonding without orbitals (RealQM)
In Standard QM, the H₂ bond is explained by overlap of fictitious 1s orbitals and occupation of a bonding state. This explanation depends entirely on non-physical one-electron states.
In RealQM (Claes Johnson), no orbitals exist. Bonding arises because, as two protons approach, the electron charge density deforms into a shared density bridge between the nuclei. The bond corresponds to a stable minimum of total energy resulting from:
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electron–nucleus attraction
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electron–electron repulsion
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kinetic energy balance
Bond length and bond energy are determined by force equilibrium, not state occupancy. The bond is a real-space density configuration.
2. Periodicity without orbitals
Standard QM attributes the periodic table to shell filling of hydrogenic orbitals, even though these orbitals are not eigenstates for multi-electron atoms.
In RealQM, periodicity arises from radial stratification of electron density as nuclear charge increases. Stable atoms form density shells, and chemical behavior is governed by the outermost density layer. When a density layer saturates, additional electrons must occupy a new spatial region, producing recurring chemical patterns.
Thus:
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shells exist as density features, not orbital sets
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valence is a property of outer density stability
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periodicity is a real-space phenomenon, not a Hilbert-space inheritance
This explains why periodicity predates QM and survives all changes of orbital representation.
3. Pauli exclusion without a postulate
In Standard QM, the Pauli Exclusion Principle is imposed as a fundamental rule via antisymmetrization in Hilbert space, with no physical mechanism.
RealQM eliminates the Pauli postulate entirely.
Electrons are treated as extended charge densities. Overlap of such densities sharply increases Coulomb energy, making overlap energetically unstable. As a result, electrons naturally avoid spatial overlap.
Exclusion, shell structure, and valence saturation arise as dynamical consequences of energy minimization, not as axioms.
Antisymmetry becomes a mathematical encoding of non-overlap, not a law of nature.
One-paragraph synthesis
RealQM replaces orbitals, shell filling, and Pauli exclusion with a single physical principle: stable electron density configurations governed by real-space energy and force balance. Chemical bonds, valence, and periodicity follow directly from this principle, while the fictitious ontology of one-electron states disappears without loss of explanatory power.
That is why RealQM can serve as a constructive foundation of chemistry, whereas Standard QM cannot.
PS Questions about chatGPT
What to say about an evaluation by chatGPT? Does it have any scientific value? Can it be twisted arbitrarily by simply directing chatGPT to desired result? Can that be eliminated by a neutral prompt? Can chatGPT be an active part in a review process used by both sides?

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