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Canonical Gymnasium Chemistry Broad-Residue Closure Audit

Snapshot: 2026-05-11

Purpose:

  • close the final low-priority broad-cluster residue after the F4 horizontal Chemistry topic pass
  • decide whether any remaining broad mapping proves a shared missing canonical atom
  • select safe P5 broad-coverage candidates for the next rollout status update

Residue Accounting

The F4 broad-mapping signal contains 710 source-to-canonical mapping edges that target canonical clusters rather than atomic goals.

Reviewed before this closure pass:

  • 442 edges under Einfuehrungsphase Reaktionsgrundlagen
  • 213 edges under Energie und Nachhaltigkeit
  • 30 broad edges to Farbstoffchemie
  • 22 broad edges under Naturstoffe und Synthesechemie / Q2 Pharmazie

That accounts for 707 broad cluster-target edges. The remaining low-priority residue is 3 edges.

Remaining Low-Priority Residue

Canonical cluster target State Broad edges Source evidence Judgment
Stoffmenge, molare Groessen und Gase (Sek I) DE-HE 2 Berechnungen: Masse, molare Masse, Stoffmenge und Konzentration von Loesungen; Saeure-Base-Titration ... Berechnung der Konzentration der Probeloesung Accepted package bridge. The exact mole, molar-mass, concentration, reaction-calculation, and titration routines are already covered by existing canonical atoms.
Kohlenwasserstoffe und Nachweise (Sek I) DE-HB 1 Kohlenwasserstoffe und Alkanole anhand ihres Molekuelbaus und ihrer Eigenschaften unterscheiden Accepted lower-secondary package bridge. Existing hydrocarbon, alkanol, molecular-structure, intermolecular-force, and elemental-analysis atoms cover the source routine.

Decision:

  • no new canonical Chemistry atom is justified by the remaining residue
  • no jurisdiction applicability should be broadened from these broad cluster mappings alone
  • reopen only if exact remapping later exposes a repeated missing assessable routine across multiple states

P5 Candidate Selection

Promote to P5 broad state coverage:

  • DE-MV
  • DE-RP
  • DE-SL
  • DE-SN
  • DE-ST
  • DE-TH

Rationale:

  • each lane has registered lower-secondary and upper-secondary Chemistry source material
  • each lane has clean source-backed projection coverage
  • the F4 horizontal topic pass found no shared canonical atom gap blocking broad coverage status
  • remaining broad mappings are accepted as package evidence rather than atom debt

Hold at P4:

  • DE-BB and DE-BE: current lane is upper-secondary only; add lower-secondary source material before broadening
  • DE-HB: current lane is lower-secondary only; add upper-secondary Chemistry source material before broadening

Existing P5 / P6 lanes remain unchanged:

  • P6: DE-BY, DE-HE
  • P5: DE-BW, DE-HH, DE-NI, DE-NW, DE-SH

Closure Decision

F4 is complete. The Chemistry graph has no proven shared canonical atom gap from the all-state broad-residue audit.

Next operational lane:

  • keep full two-stage P5 states on maintenance
  • complete the missing-stage source lanes for DE-BB, DE-BE, and DE-HB before broadening those states
  • consider P6 cutover readiness only after runtime, composition-view, and legacy migration checks