{"query": "Francium (Fr) — element 87", "count": 4, "results": [{"id": "card_ref_el_087", "title": "Francium (Fr) — element 87", "shelf": "chemistry", "surface": "secular", "snippet": "Atomic number 87. Symbol Fr. Standard atomic weight 223.0. The francium atom carries 87 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", "generated": false}, {"id": "card_src_word_francium", "title": "francium", "shelf": "dictionary", "surface": "secular", "snippet": "francium: (noun) a radioactive element of the alkali-metal group discovered as a disintegration product of actinium — syn: Fr, atomic number 87", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_word_fr", "title": "fr", "shelf": "dictionary", "surface": "secular", "snippet": "fr: (noun) a radioactive element of the alkali-metal group discovered as a disintegration product of actinium — syn: francium, atomic number 87", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_word_atomic_number_87", "title": "atomic number 87", "shelf": "dictionary", "surface": "secular", "snippet": "atomic number 87: (noun) a radioactive element of the alkali-metal group discovered as a disintegration product of actinium — syn: francium, Fr", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}]}