{"query": "Thorium (Th) — element 90", "count": 6, "results": [{"id": "card_ref_el_090", "title": "Thorium (Th) — element 90", "shelf": "chemistry", "surface": "secular", "snippet": "Atomic number 90. Symbol Th. Standard atomic weight 232.0377. The thorium atom carries 90 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_thorium_228", "title": "thorium-228", "shelf": "dictionary", "surface": "secular", "snippet": "thorium-228: (noun) radioactive isotope of thorium with mass number 228 — syn: radiothorium", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_word_thorium", "title": "thorium", "shelf": "dictionary", "surface": "secular", "snippet": "thorium: (noun) a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands — syn: Th, atomic numb", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_pron_thorium", "title": "thorium", "shelf": "pronunciation", "surface": "secular", "snippet": "thorium: pronounced (ARPABET) TH AA1 R IY0 AH0 M. 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", "generated": false}, {"id": "card_src_word_atomic_number_90", "title": "atomic number 90", "shelf": "dictionary", "surface": "secular", "snippet": "atomic number 90: (noun) a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands — syn: thoriu", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_word_th", "title": "th", "shelf": "dictionary", "surface": "secular", "snippet": "th: (noun) the fifth day of the week; the fourth working day — syn: Thursday · (noun) a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear re", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}]}