{"query": "Hydrogen (H) — element 1", "count": 20, "results": [{"id": "card_ref_el_001", "title": "Hydrogen (H) — element 1", "shelf": "chemistry", "surface": "secular", "snippet": "Atomic number 1. Symbol H. Standard atomic weight 1.008. The hydrogen atom carries 1 proton in its nucleus; its place in the periodic table is fixed by that count. Verified reference data.", "authority_tier": "reference", "source": "Verified reference — chemistry", "readable": false, "generated": false}, {"id": "card_theory_stellar_nucleosynthesis_the_hr_diagram", "title": "Stellar nucleosynthesis & the HR diagram", "shelf": "theories", "surface": "secular", "snippet": "Stellar nucleosynthesis & the HR diagram — an engine domain that can touch it: astronomy. Calibration: partial — specific relations verify; the theory as a whole is not a sealable computation. Where t", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "readable": false, "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)", "readable": false, "generated": false}, {"id": "card_theory_nuclear_decay_binding_energy", "title": "Nuclear decay & binding energy", "shelf": "theories", "surface": "secular", "snippet": "Nuclear decay & binding energy — an engine domain that can touch it: nuclear_physics. Calibration: seals — half-lives, decay chains and mass-energy conversions compute. An unstable nucleus decays with", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "readable": false, "generated": false}, {"id": "card_theory_dna_structure", "title": "The double helix (structure that explains its own copying)", "shelf": "theories", "surface": "secular", "snippet": "The double helix (structure that explains its own copying) — an engine domain that can touch it: genetics. Calibration: seals — base-pair ratios, melting temperatures and complement sequences compute.", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "readable": false, "generated": false}, {"id": "card_theory_br_nsted_lowry_acid_base_theory_ph", "title": "Brønsted–Lowry acid–base theory & pH", "shelf": "theories", "surface": "secular", "snippet": "Brønsted–Lowry acid–base theory & pH — an engine domain that can touch it: chemistry. Calibration: seals — pH, pKa and buffer calculations compute exactly. An acid DONATES a proton, a base ACCEPTS one", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "readable": false, "generated": false}, {"id": "card_src_openstax_anatomy_and_physiology_2e_chapter_review_6112a6f1", "title": "Chapter Review — Anatomy and Physiology 2e", "shelf": "medicine", "surface": "secular", "snippet": "Chapter Review\n\n2.1\n\nElements and Atoms: The Building Blocks of Matter\n\nThe human body is composed of elements, the most abundant of which are oxygen (O), carbon (C), hydrogen (H) and nitrogen (N). Yo", "authority_tier": "reference", "source": "OpenStax: Anatomy and Physiology 2e (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_src_openstax_anatomy_and_physiology_chapter_review_3e151ada", "title": "Chapter Review — Anatomy and Physiology", "shelf": "medicine", "surface": "secular", "snippet": "Chapter Review\n\n2.1\n\nElements and Atoms: The Building Blocks of Matter\n\nThe human body is composed of elements, the most abundant of which are oxygen (O), carbon (C), hydrogen (H) and nitrogen (N). Yo", "authority_tier": "reference", "source": "OpenStax: Anatomy and Physiology (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_src_openstax_anatomy_and_physiology_2e_review_questions_95f64ff2", "title": "Review Questions — Anatomy and Physiology 2e", "shelf": "medicine", "surface": "secular", "snippet": "Review Questions\n\n4.\n\nTogether, just four elements make up more than 95 percent of the body’s mass. These include ________.\n\ncalcium, magnesium, iron, and carbon\n\noxygen, calcium, iron, and nitrogen\n\n", "authority_tier": "reference", "source": "OpenStax: Anatomy and Physiology 2e (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_src_openstax_anatomy_and_physiology_review_questions_b373a7e0", "title": "Review Questions — Anatomy and Physiology", "shelf": "medicine", "surface": "secular", "snippet": "Review Questions\n\n4.\n\nTogether, just four elements make up more than 95 percent of the body’s mass. These include ________.\n\ncalcium, magnesium, iron, and carbon\n\noxygen, calcium, iron, and nitrogen\n\n", "authority_tier": "reference", "source": "OpenStax: Anatomy and Physiology (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_n_77d37f00f1dd", "title": "Base pairing and the central dogma", "shelf": "science", "surface": "secular", "snippet": "The information flows DNA -> RNA -> protein (Crick's central dogma), and it is held by\ncomplementary pairs: A binds T with two hydrogen bonds, G binds C with three. Chargaff's rule\n(that A=T and G=C i", "authority_tier": "engine_derived", "source": "Concordance assay — 2026-07-09", "readable": false, "generated": false}, {"id": "card_n_ae08bd563c6e", "title": "Balancing equations — nothing is created or destroyed", "shelf": "science", "surface": "secular", "snippet": "Lavoisier's law: matter is conserved, so a chemical equation must have equal atoms on\nboth sides. The engine balances in-domain — given CH4 + O2 -> CO2 + H2O it returns the true\ncoefficients CH4 + 2 O", "authority_tier": "engine_derived", "source": "Concordance assay — 2026-07-09", "readable": false, "generated": false}, {"id": "card_n_cda0b1e1a364", "title": "Fusion — why the stars shine", "shelf": "science", "surface": "secular", "snippet": "Four hydrogens weigh more than one helium; the difference is sunlight. Sealed from\nthe measured masses: 4·m(H) − m(He-4) = 0.0287 u → 26.73 MeV per helium forged: https://narrowhighway.com/s/8a5e89ab1", "authority_tier": "engine_derived", "source": "Concordance assay — 2026-07-09", "readable": false, "generated": false}, {"id": "card_src_openstax_chemistry_2e_summary_32a3e62d", "title": "Summary — Chemistry 2e", "shelf": "chemistry", "surface": "secular", "snippet": "Summary\n\n20.1\n\nHydrocarbons\n\nStrong, stable bonds between carbon atoms produce complex molecules containing chains, branches, and rings. The chemistry of these compounds is called organic chemistry. H", "authority_tier": "reference", "source": "OpenStax: Chemistry 2e (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_power_batteries", "title": "Batteries — the store, and how not to wreck it", "shelf": "energy", "surface": "secular", "snippet": "The battery is your reservoir. LEAD-ACID (flooded/AGM) is cheap but heavy, and you must not regularly drain it below ~50% or it dies young — so a 100 Ah lead-acid battery gives ~50 Ah of usable energy", "authority_tier": "reference", "source": "U.S. Department of Energy / NREL consumer energy guidance (public domain)", "readable": false, "generated": false}, {"id": "card_src_openstax_astronomy_2e_22_5_the_evolution_of_more_massive_stars_a75aea70", "title": "22.5 The Evolution of More Massive Stars — Astronomy 2e", "shelf": "astronomy", "surface": "secular", "snippet": "22.5\n\nThe Evolution of More Massive Stars\n\nLearning Objectives\n\nBy the end of this section, you will be able to:\n\nExplain how and why massive stars evolve much more rapidly than lower-mass stars like ", "authority_tier": "reference", "source": "OpenStax: Astronomy 2e (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_src_openstax_astronomy_22_5_the_evolution_of_more_massive_stars_a75aea70", "title": "22.5 The Evolution of More Massive Stars — Astronomy", "shelf": "astronomy", "surface": "secular", "snippet": "22.5\n\nThe Evolution of More Massive Stars\n\nLearning Objectives\n\nBy the end of this section, you will be able to:\n\nExplain how and why massive stars evolve much more rapidly than lower-mass stars like ", "authority_tier": "reference", "source": "OpenStax: Astronomy (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_src_fed_nasa_techdoc_19700018655", "title": "Lithium-fluorine-hydrogen propellant investigation Final report", "shelf": "science", "surface": "secular", "snippet": "Lithium-fluorine-hydrogen propellant investigation Final report. A United States federal publication, public domain (17 USC 105). The full text (330,290 bytes) is held on the ark; waybill sha256 86d1e", "authority_tier": "reference", "source": "NASA technical documents (PD, 17 USC 105)", "readable": true, "generated": false}, {"id": "card_src_openstax_astronomy_25_5_stellar_populations_in_the_galaxy_42d678ee", "title": "25.5 Stellar Populations in the Galaxy — Astronomy", "shelf": "astronomy", "surface": "secular", "snippet": "25.5\n\nStellar Populations in the Galaxy\n\nLearning Objectives\n\nBy the end of this section, you will be able to:\n\nDistinguish between population I and population II stars according to their locations, m", "authority_tier": "reference", "source": "OpenStax: Astronomy (CC-BY 4.0)", "readable": false, "generated": false}, {"id": "card_src_openstax_astronomy_2e_25_5_stellar_populations_in_the_galaxy_42d678ee", "title": "25.5 Stellar Populations in the Galaxy — Astronomy 2e", "shelf": "astronomy", "surface": "secular", "snippet": "25.5\n\nStellar Populations in the Galaxy\n\nLearning Objectives\n\nBy the end of this section, you will be able to:\n\nDistinguish between population I and population II stars according to their locations, m", "authority_tier": "reference", "source": "OpenStax: Astronomy 2e (CC-BY 4.0)", "readable": false, "generated": false}], "house": {"door": "FIND", "kind": "cards", "trail": "results", "seal": null, "next_step": {"do": "open the top card", "door": "FIND", "tool": "card_get", "params": {"id": "card_ref_el_001"}}, "ends": "a verdict or a card · the trail · a seal · one next step"}}