{"query": "The electrons of sodium, shell by shell", "count": 20, "results": [{"id": "card_works_atom", "title": "The electrons of sodium, shell by shell", "shelf": "the-works", "surface": "secular", "snippet": "Sodium's eleven electrons fill the shells in a fixed order — 1s² 2s² 2p⁶ 3s¹ — and that one lonely outer electron is the whole reason sodium is so reactive.  Worked & sealed by the engine — Z=11 groun", "authority_tier": "verified", "source": "The Works — worked & sealed", "generated": false}, {"id": "card_theory_pauli_exclusion_principle", "title": "Pauli exclusion principle", "shelf": "theories", "surface": "secular", "snippet": "Pauli exclusion principle — an engine domain that can touch it: atomic. Calibration: seals — electron configurations and shell capacities compute. No two identical fermions may occupy the same quantum", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_theory_chemical_bonding", "title": "Chemical bonding (valence-bond / molecular-orbital)", "shelf": "theories", "surface": "secular", "snippet": "Chemical bonding (valence-bond / molecular-orbital) — an engine domain that can touch it: chemistry. Calibration: partial — some relations verify; the full theory is map-only. Atoms bond to lower thei", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_theory_bohr_quantum_model_of_the_atom", "title": "Bohr / quantum model of the atom", "shelf": "theories", "surface": "secular", "snippet": "Bohr / quantum model of the atom — an engine domain that can touch it: atomic. Calibration: seals — energy levels and shell capacities compute. Electrons occupy discrete orbits with QUANTISED energies", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_theory_vsepr_theory", "title": "VSEPR theory (molecular geometry)", "shelf": "theories", "surface": "secular", "snippet": "VSEPR theory (molecular geometry) — an engine domain that can touch it: molecular_geometry. Calibration: seals — shapes and bond angles predict directly. Valence Shell Electron Pair Repulsion: electro", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_theory_wave_optics", "title": "Wave optics (Huygens, Snell's law, diffraction)", "shelf": "theories", "surface": "secular", "snippet": "Wave optics (Huygens, Snell's law, diffraction) — an engine domain that can touch it: optics. Calibration: seals — refraction, lens and diffraction relations compute. Light behaves as a wave: it refra", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_theory_condensed_matter", "title": "Condensed matter & semiconductors (band theory and the transistor)", "shelf": "theories", "surface": "secular", "snippet": "Condensed matter & semiconductors (band theory and the transistor) — an engine domain that can touch it: materials_science. Calibration: map-only — band gaps and carrier concentrations compute; the fi", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_theory_quasicrystals", "title": "Quasicrystals (forbidden symmetry in real matter)", "shelf": "theories", "surface": "secular", "snippet": "Matter that is ordered but not periodic. Dan Shechtman recorded an electron diffraction pattern from rapidly cooled Al-Mn on 8 April 1982 showing SHARP Bragg peaks with ten-fold symmetry — sharp peaks", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_theory_electrochemistry", "title": "Electrochemistry & the battery (Volta, Faraday, and stored charge)", "shelf": "theories", "surface": "secular", "snippet": "Electrochemistry & the battery (Volta, Faraday, and stored charge) — an engine domain that can touch it: chemistry. Calibration: seals — cell voltages, Faraday's laws of electrolysis and Nernst shifts", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_theory_plasma_physics", "title": "Plasma physics (the fourth state, and most of the universe)", "shelf": "theories", "surface": "secular", "snippet": "Plasma physics (the fourth state, and most of the universe) — an engine domain that can touch it: physics. Calibration: map-only — specific relations compute; the regime as a whole is not a sealable c", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_theory_quantization", "title": "Quantization (why nature comes in whole units)", "shelf": "theories", "surface": "secular", "snippet": "Quantization (why nature comes in whole units) — an engine domain that can touch it: physics. Calibration: seals — energy levels, photon energies and charge multiples compute exactly. Certain physical", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_domchk_atomic_claimed_shell_capacity", "title": "Atomic: shell capacity", "shelf": "atomic", "surface": "secular", "snippet": "A worked check in atomic: shell capacity.\n\nGIVEN\n  l = 2\n  n = 3\n  shell_n = 3\n  subshell_l = 2\n\nCLAIMED\n  claimed_shell_capacity = 18\n\nTHE ENGINE'S VERDICT\n  atomic.quantum_numbers: CONFIRMED — valid", "authority_tier": "reference", "source": "The verifier's own documented relation, and a run this engine performed against it (deterministic; re-runnable with tools/domain_goldens.py)", "generated": false}, {"id": "card_src_word_electron_shell", "title": "electron shell", "shelf": "dictionary", "surface": "secular", "snippet": "electron shell: (noun) a grouping of electrons surrounding the nucleus of an atom", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_word_electron_gun", "title": "electron gun", "shelf": "dictionary", "surface": "secular", "snippet": "electron gun: (noun) the electrode that is the source of electrons in a cathode-ray tube or electron microscope; consists of a cathode that emits a stream of electrons and the electrostatic or electro", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_book_63638", "title": "Electron Eat Electron — Noel M. Loomis", "shelf": "gutenberg", "surface": "secular", "snippet": "Electron Eat Electron, by Noel M. Loomis. Subjects: Science fiction; Short stories; War stories; Nuclear warfare -- Fiction. Read the full text (public domain): https://www.gutenberg.org/ebooks/63638", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "generated": false}, {"id": "card_src_word_valence_electron", "title": "valence electron", "shelf": "dictionary", "surface": "secular", "snippet": "valence electron: (noun) an electron in the outer shell of an atom which can combine with other atoms to form molecules", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_book_77675", "title": "Atoms and electrons — J. W. N. (John William Navin) Sullivan", "shelf": "gutenberg", "surface": "secular", "snippet": "Atoms and electrons, by J. W. N. (John William Navin) Sullivan. Subjects: Electrons; Atoms. Read the full text (public domain): https://www.gutenberg.org/ebooks/77675", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "generated": false}, {"id": "card_src_book_73297", "title": "The electron, its isolation and measurement and the determination of some of its properties — Robert Andrews Millikan", "shelf": "gutenberg", "surface": "secular", "snippet": "The electron, its isolation and measurement and the determination of some of its properties, by Robert Andrews Millikan. Subjects: Electrons. Read the full text (public domain): https://www.gutenberg.", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "generated": false}, {"id": "card_src_word_electron_microscopy", "title": "electron microscopy", "shelf": "dictionary", "surface": "secular", "snippet": "electron microscopy: (noun) microscopy with the use of electron microscopes", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_word_electron_multiplier", "title": "electron multiplier", "shelf": "dictionary", "surface": "secular", "snippet": "electron multiplier: (noun) a vacuum tube that amplifies a flow of electrons", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}]}