0.5 Atomic Shell and Ionization Values
| Quantity | Symbol | Value | Status | Use |
|---|---|---|---|---|
| Hydrogen ground-state separation | HGS | 29,447,705.851L0 | Derived | First-shell anchor and ionization construction. |
| Shell 1 radius | S1 | 29,447,706L0 | Derived | First atomic shell and bonding anchor. |
| Shell 2 radius | S2 | 105,124,156L0 | Derived | Second-shell bonding and ionization geometry. |
| Shell 3 radius | S3 | 121,091,309L0 | Derived | Higher-shell bonding and atomic structure. |
| Shell 4 radius | S4 | 153,576,343L0 | Derived | Higher-shell comparison. |
| Hydrogen ionization energy | EH | 13.598434 eV | Derived with measured validation | Hydrogen ionization anchor and one-electron energy ladder. |
| Measured hydrogen ionization energy | Eion(H) | 13.598434599702 eV | Measured anchor / validation comparison | Measured comparison only. |