{"query": "Lead (Pb) — element 82", "count": 20, "results": [{"id": "card_ref_el_082", "title": "Lead (Pb) — element 82", "shelf": "chemistry", "surface": "secular", "snippet": "Atomic number 82. Symbol Pb. Standard atomic weight 207.2. The lead atom carries 82 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_nuclide_pb_206", "title": "Pb-206 — pb-206", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-206: 82 protons, 124 neutrons, mass number A=206. Stable. Natural abundance 0.24100000000000002. Atomic mass 205.974465 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_207", "title": "Pb-207 — pb-207", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-207: 82 protons, 125 neutrons, mass number A=207. Stable. Natural abundance 0.221. Atomic mass 206.975897 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_208", "title": "Pb-208 — pb-208", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-208: 82 protons, 126 neutrons, mass number A=208. Stable. Natural abundance 0.524. Atomic mass 207.976652 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_219", "title": "Pb-219 — pb-219", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-219: 82 protons, 137 neutrons, mass number A=219. Unstable. Primary decay: B- 1%. Atomic mass 219.022136 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_178", "title": "Pb-178 — pb-178", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-178: 82 protons, 96 neutrons, mass number A=178. Half-life 0.00012 s. Primary decay: A 1%. Atomic mass 178.003836 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_179", "title": "Pb-179 — pb-179", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-179: 82 protons, 97 neutrons, mass number A=179. Half-life 0.0035 s. Primary decay: A 1%. Atomic mass 179.002202 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_180", "title": "Pb-180 — pb-180", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-180: 82 protons, 98 neutrons, mass number A=180. Half-life 0.0041 s. Primary decay: A 1%. Atomic mass 179.997916 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_181", "title": "Pb-181 — pb-181", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-181: 82 protons, 99 neutrons, mass number A=181. Half-life 0.045 s. Primary decay: A 1%. Atomic mass 180.996661 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_182", "title": "Pb-182 — pb-182", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-182: 82 protons, 100 neutrons, mass number A=182. Half-life 0.055 s. Primary decay: A 0.98%. Atomic mass 181.992674 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_183", "title": "Pb-183 — pb-183", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-183: 82 protons, 101 neutrons, mass number A=183. Half-life 0.535 s. Primary decay: A 0.9%. Atomic mass 182.991863 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_184", "title": "Pb-184 — pb-184", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-184: 82 protons, 102 neutrons, mass number A=184. Half-life 0.49 s. Primary decay: A 0.8%. Atomic mass 183.988136 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_185", "title": "Pb-185 — pb-185", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-185: 82 protons, 103 neutrons, mass number A=185. Half-life 6.3 s. Primary decay: A 0.34%. Atomic mass 184.987610 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_193", "title": "Pb-193 — pb-193", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-193: 82 protons, 111 neutrons, mass number A=193. Unstable. Primary decay: EC+B+. Atomic mass 192.976136 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_209", "title": "Pb-209 — pb-209", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-209: 82 protons, 127 neutrons, mass number A=209. Half-life 11642.4 s. Primary decay: B- 1%. Atomic mass 208.981090 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_210", "title": "Pb-210 — pb-210", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-210: 82 protons, 128 neutrons, mass number A=210. Half-life 700563756.635943 s. Primary decay: B- 1%. Atomic mass 209.984188 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_211", "title": "Pb-211 — pb-211", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-211: 82 protons, 129 neutrons, mass number A=211. Half-life 2166.0 s. Primary decay: B- 1%. Atomic mass 210.988735 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_212", "title": "Pb-212 — pb-212", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-212: 82 protons, 130 neutrons, mass number A=212. Half-life 38239.2 s. Primary decay: B- 1%. Atomic mass 211.991896 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_213", "title": "Pb-213 — pb-213", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-213: 82 protons, 131 neutrons, mass number A=213. Half-life 612.0 s. Primary decay: B- 1%. Atomic mass 212.996561 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}, {"id": "card_src_nuclide_pb_214", "title": "Pb-214 — pb-214", "shelf": "nuclear_physics", "surface": "secular", "snippet": "Nuclide Pb-214: 82 protons, 132 neutrons, mass number A=214. Half-life 1623.6 s. Primary decay: B- 1%. Atomic mass 213.999804 u.", "authority_tier": "reference", "source": "NNDC / AME nuclide data (public domain)", "generated": false}]}