{"query": "Chromium (Cr) — element 24", "count": 20, "results": [{"id": "card_ref_el_024", "title": "Chromium (Cr) — element 24", "shelf": "chemistry", "surface": "secular", "snippet": "Atomic number 24. Symbol Cr. Standard atomic weight 51.9961. The chromium atom carries 24 protons 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_src_frd_iran", "title": "Iran: A Country Study", "shelf": "countries", "surface": "secular", "snippet": "Topography: Iran has rugged mountain chains surrounding several basins collectively known as the Central Plateau, which has an average elevation of about 900 meters. East of the Central Plateau are tw", "authority_tier": "reference", "source": "Iran: A Country Study — Federal Research Division, Library of Congress (2008) (public domain)", "readable": true, "generated": false}, {"id": "card_src_word_chromium", "title": "chromium", "shelf": "dictionary", "surface": "secular", "snippet": "chromium: (noun) a hard brittle multivalent metallic element; resistant to corrosion and tarnishing — syn: Cr, atomic number 24", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_word_cr", "title": "cr", "shelf": "dictionary", "surface": "secular", "snippet": "cr: (noun) a hard brittle multivalent metallic element; resistant to corrosion and tarnishing — syn: chromium, atomic number 24", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_etym_chromium", "title": "chromium", "shelf": "etymology", "surface": "secular", "snippet": "chromium: etymology (Webster 1913) — n.: [NL., fr. Gr. (Chem.) Defn: A comparatively rare element occurring most abundantly in the mineral chromite. Atomic weight 52.5. Symbol Cr. When isolated it is ", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_src_fed_chromium00daydrich", "title": "Chromium", "shelf": "geology", "surface": "secular", "snippet": "Chromium. A United States federal publication, public domain (17 USC 105). The full text (24,016 bytes) is held on the ark; waybill sha256 3afcea8f7cc01603…; origin archive.org/chromium00daydrich. A h", "authority_tier": "reference", "source": "US Geological Survey publications (PD, 17 USC 105)", "readable": true, "generated": false}, {"id": "card_src_word_atomic_number_24", "title": "atomic number 24", "shelf": "dictionary", "surface": "secular", "snippet": "atomic number 24: (noun) a hard brittle multivalent metallic element; resistant to corrosion and tarnishing — syn: chromium, Cr", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_etym_chromatype", "title": "chromatype", "shelf": "etymology", "surface": "secular", "snippet": "chromatype: etymology (Webster 1913) — n.: [Gr. 1. (Photog.) Defn: A colored photographic picture taken upon paper made sensitive with potassium bichromate or some other salt of chromium. 2. The proce", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "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)", "readable": false, "generated": false}, {"id": "card_src_pron_dissolves", "title": "dissolves", "shelf": "pronunciation", "surface": "secular", "snippet": "dissolves: pronounced (ARPABET) D IH0 Z AA1 L V Z. From the CMU Pronouncing Dictionary — the standard machine-readable pronunciations of North American English.", "authority_tier": "reference", "source": "CMU Pronouncing Dictionary (cmudict) — BSD-2-Clause, Carnegie Mellon", "readable": false, "generated": false}, {"id": "card_src_etym_dissolution", "title": "dissolution", "shelf": "etymology", "surface": "secular", "snippet": "dissolution: etymology (Webster 1913) — n.: [OE. dissolucioun dissoluteness, F. dissolution, fr. L. dissolutio, fr. dissolvere. See Dissolve.]. From Webster's Revised Unabridged Dictionary (1913), pub", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_span_edf3b9c81714", "title": "When the liquid will drop in a continuous thread from the stirrer", "shelf": "sources", "surface": "secular", "snippet": "When  the  liquid  will  drop  in  a  continuous  thread  from \nthe  stirrer,  and  jellifies  on  cooling,  it  is  ready  for  the \n^^  cutting\"  process.  This  consists  in  throwing  in  salt  by", "authority_tier": "primary_pd", "source": "A treatise on chemistry applied to the manufacture of soap and candles; being a thorough exposition, in all their minuti", "readable": true, "generated": false}, {"id": "card_alm_assessment_popper_falsifiability_is_the_method", "title": "Almanac: Falsifiability -- a theory must forbid something; the fork -- demarcation over-applied banishes the metaphysics it cannot test", "shelf": "almanac", "surface": "secular", "snippet": "SITUATION\n  THE KERNEL: Popper got the deep thing right, and it is the engine's own heartbeat. A claim with content forbids something; it sticks its neck out; it can be refuted by a single counterexam", "authority_tier": "reference", "source": "The Almanac — verified-only practical wisdom (sealed)", "readable": false, "generated": false}, {"id": "card_domchk_periodic_table_claimed_atomic_number", "title": "Periodic Table: atomic number", "shelf": "periodic_table", "surface": "secular", "snippet": "A worked check in periodic table: atomic number.\n\nGIVEN\n  symbol = Fe\n\nCLAIMED\n  claimed_atomic_number = 26\n\nTHE ENGINE'S VERDICT\n  periodic_table.element: CONFIRMED — Fe (iron, Z=26) — definitional c", "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)", "readable": false, "generated": false}, {"id": "card_v_958fb7e1a9f3", "title": "the atomic number of iron is 27", "shelf": "periodic_table", "surface": "secular", "snippet": "Verdict: BROKEN.\n• periodic_table.element: atomic number: actual Z=26, claimed 27\nSealed and independently re-checkable: https://narrowhighway.org/s/65b79ffaa798ac353aec0354578cd3708c4fc364b8437fe180f", "authority_tier": "engine", "source": "Verified by the engine — periodic_table", "readable": false, "generated": false}, {"id": "card_theory_periodic_law", "title": "Periodic law (Mendeleev)", "shelf": "theories", "surface": "secular", "snippet": "Periodic law (Mendeleev) — an engine domain that can touch it: periodic_table. Calibration: seals — element properties and group trends look up and compute. Arrange elements by atomic number and their", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "readable": false, "generated": false}, {"id": "card_theory_dalton_s_atomic_theory", "title": "Dalton's atomic theory", "shelf": "theories", "surface": "secular", "snippet": "Dalton's atomic theory — an engine domain that can touch it: chemistry. Calibration: partial — mass ratios verify. Matter is made of indivisible atoms; all atoms of an element share a mass; compounds ", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "readable": false, "generated": false}, {"id": "card_v_cfe8a0172379", "title": "iron has atomic number 26", "shelf": "periodic_table", "surface": "secular", "snippet": "Verdict: HOLDS.\n• periodic_table.element: Fe (iron, Z=26) — definitional claims match\nSealed and independently re-checkable: https://narrowhighway.org/s/9792f17e8050600544197d45e971850ecc493007e97a445", "authority_tier": "engine", "source": "Verified by the engine — periodic_table", "readable": false, "generated": false}, {"id": "card_v_0f89b0d17c5f", "title": "the atomic number of iron is 26", "shelf": "periodic_table", "surface": "secular", "snippet": "Verdict: HOLDS.\n• periodic_table.element: Fe (iron, Z=26) — definitional claims match\nSealed and independently re-checkable: https://narrowhighway.org/s/16aac96d5db9f4076e2c24c6c4511f621cd9c6baa85b547", "authority_tier": "engine", "source": "Verified by the engine — periodic_table", "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}], "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_024"}}, "ends": "a verdict or a card · the trail · a seal · one next step"}}