{"query": "Actinium (Ac) — element 89", "count": 5, "results": [{"id": "card_ref_el_089", "title": "Actinium (Ac) — element 89", "shelf": "chemistry", "surface": "secular", "snippet": "Atomic number 89. Symbol Ac. Standard atomic weight 227.0. The actinium atom carries 89 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_drug_actinium_ac_225_satetraxetan_lysine", "title": "Actinium Ac-225 Satetraxetan-Lysine", "shelf": "medicine", "surface": "secular", "snippet": "ACTINIUM AC-225 SATETRAXETAN-LYSINE: a BULK INGREDIENT, liquid.", "authority_tier": "reference", "source": "openFDA / FDA NDC Directory (public domain)", "generated": false}, {"id": "card_src_word_actinium", "title": "actinium", "shelf": "dictionary", "surface": "secular", "snippet": "actinium: (noun) a radioactive element of the actinide series; found in uranium ores — syn: Ac, atomic number 89", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_word_atomic_number_89", "title": "atomic number 89", "shelf": "dictionary", "surface": "secular", "snippet": "atomic number 89: (noun) a radioactive element of the actinide series; found in uranium ores — syn: actinium, Ac", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_word_ac", "title": "ac", "shelf": "dictionary", "surface": "secular", "snippet": "ac: (noun) a radioactive element of the actinide series; found in uranium ores — syn: actinium, atomic number 89 · (noun) an electric current that reverses direction sinusoidally — syn: alternating cu", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}]}