{"query": "Berkelium (Bk) — element 97", "count": 4, "results": [{"id": "card_ref_el_097", "title": "Berkelium (Bk) — element 97", "shelf": "chemistry", "surface": "secular", "snippet": "Atomic number 97. Symbol Bk. Standard atomic weight 247.0. The berkelium atom carries 97 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_berkelium", "title": "berkelium", "shelf": "dictionary", "surface": "secular", "snippet": "berkelium: (noun) a radioactive transuranic element; discovered by bombarding americium with helium — syn: Bk, atomic number 97", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_word_bk", "title": "bk", "shelf": "dictionary", "surface": "secular", "snippet": "bk: (noun) a radioactive transuranic element; discovered by bombarding americium with helium — syn: berkelium, atomic number 97", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_word_atomic_number_97", "title": "atomic number 97", "shelf": "dictionary", "surface": "secular", "snippet": "atomic number 97: (noun) a radioactive transuranic element; discovered by bombarding americium with helium — syn: berkelium, Bk", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}]}