{"query": "Chlorine (Cl) — element 17", "count": 20, "results": [{"id": "card_ref_el_017", "title": "Chlorine (Cl) — element 17", "shelf": "chemistry", "surface": "secular", "snippet": "Atomic number 17. Symbol Cl. Standard atomic weight 35.45. The chlorine atom carries 17 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_n_6e7a5b14e556", "title": "The periodic table — the map of the elements", "shelf": "science", "surface": "secular", "snippet": "118 elements, ordered by proton count, and their properties RECUR in periods — the\nsingle most predictive table in science. Sealed in-domain: carbon is element 6, symbol C\n(https://narrowhighway.com/s", "authority_tier": "engine_derived", "source": "Concordance assay — 2026-07-09", "readable": false, "generated": false}, {"id": "card_survival_purify_water", "title": "Making water safe to drink", "shelf": "survival", "surface": "secular", "snippet": "Boiling is surest: bring clear water to a ROLLING boil for 1 minute (3 minutes above ~6,500 ft), let cool. No fire? Use unscented household bleach (5–9% sodium hypochlorite): 2 drops per quart/liter o", "authority_tier": "reference", "source": "CDC/EPA emergency water guidance (U.S. government, public domain)", "readable": false, "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_water_filters", "title": "Filters — what each kind actually removes", "shelf": "water", "surface": "secular", "snippet": "Not all filters do the same job. SEDIMENT/cloth filters remove dirt and grit only. CERAMIC and HOLLOW-FIBER (0.1–0.2 micron) filters remove bacteria and protozoa (giardia, crypto) but usually NOT viru", "authority_tier": "reference", "source": "U.S. EPA drinking-water guidance (public domain)", "readable": false, "generated": false}, {"id": "card_water_clarify", "title": "Making cloudy water clear before you treat it", "shelf": "water", "surface": "secular", "snippet": "Disinfection (chlorine especially) works poorly on cloudy water — the particles shield germs and soak up the chlorine. So CLARIFY first: let muddy water SETTLE for an hour or more and pour off the cle", "authority_tier": "reference", "source": "CDC water safety & storage guidance (U.S. government, public domain)", "readable": false, "generated": false}, {"id": "card_src_word_atomic_number_17", "title": "atomic number 17", "shelf": "dictionary", "surface": "secular", "snippet": "atomic number 17: (noun) a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occu", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_word_chlorine", "title": "chlorine", "shelf": "dictionary", "surface": "secular", "snippet": "chlorine: (noun) a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs natur", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_word_cl", "title": "cl", "shelf": "dictionary", "surface": "secular", "snippet": "cl: (noun) a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally o", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "readable": false, "generated": false}, {"id": "card_src_etym_chlorine", "title": "chlorine", "shelf": "etymology", "surface": "secular", "snippet": "chlorine: etymology (Webster 1913) — n.: [Gr. Yellow.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_src_etym_chloral", "title": "chloral", "shelf": "etymology", "surface": "secular", "snippet": "chloral: etymology (Webster 1913) — n.: [Chlorine + alcohol.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_src_etym_chloralum", "title": "chloralum", "shelf": "etymology", "surface": "secular", "snippet": "chloralum: etymology (Webster 1913) — n.: [Chlorine + aluminium.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_src_etym_chloranil", "title": "chloranil", "shelf": "etymology", "surface": "secular", "snippet": "chloranil: etymology (Webster 1913) — n.: [Chlorine + aniline.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_src_etym_chloraurate", "title": "chloraurate", "shelf": "etymology", "surface": "secular", "snippet": "chloraurate: etymology (Webster 1913) — n.: [Chlorine + aurate.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_src_etym_chloric", "title": "chloric", "shelf": "etymology", "surface": "secular", "snippet": "chloric: etymology (Webster 1913) — a.: [From Chlorine.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_src_etym_chloropeptic", "title": "chloropeptic", "shelf": "etymology", "surface": "secular", "snippet": "chloropeptic: etymology (Webster 1913) — a.: [Chlorine + peptic.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_src_etym_chlorous", "title": "chlorous", "shelf": "etymology", "surface": "secular", "snippet": "chlorous: etymology (Webster 1913) — a.: [See Chlorine.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_src_etym_antichlor", "title": "antichlor", "shelf": "etymology", "surface": "secular", "snippet": "antichlor: etymology (Webster 1913) — n.: [Pref. anti- + chlorine.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_src_etym_chlorhydric", "title": "chlorhydric", "shelf": "etymology", "surface": "secular", "snippet": "chlorhydric: etymology (Webster 1913) — a.: [Chlorine + hydrogen + -ic.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "generated": false}, {"id": "card_src_etym_chlorate", "title": "chlorate", "shelf": "etymology", "surface": "secular", "snippet": "chlorate: etymology (Webster 1913) — n.: [Cf. F. chlorate. See Chlorine.]. From Webster's Revised Unabridged Dictionary (1913), public domain.", "authority_tier": "reference", "source": "Webster's Revised Unabridged Dictionary (1913), Project Gutenberg eBook #29765 — public domain", "readable": true, "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_017"}}, "ends": "a verdict or a card · the trail · a seal · one next step"}}