{
 "source": "https://peabody.kids/flashcards/chem-atomic-numbers-61-90",
 "id": "chem-atomic-numbers-61-90",
 "title": "Elements 61 to 90",
 "category": "science",
 "subject": "Chemistry",
 "levels": [
  "college"
 ],
 "description": "Atomic numbers 61 to 90 with each element's name and symbol.",
 "tags": [
  "periodic table",
  "atomic number"
 ],
 "frontLabel": "Atomic number",
 "backLabel": "Element",
 "cards": [
  [
   "61",
   "Promethium (Pm)"
  ],
  [
   "62",
   "Samarium (Sm)"
  ],
  [
   "63",
   "Europium (Eu)"
  ],
  [
   "64",
   "Gadolinium (Gd)"
  ],
  [
   "65",
   "Terbium (Tb)"
  ],
  [
   "66",
   "Dysprosium (Dy)"
  ],
  [
   "67",
   "Holmium (Ho)"
  ],
  [
   "68",
   "Erbium (Er)"
  ],
  [
   "69",
   "Thulium (Tm)"
  ],
  [
   "70",
   "Ytterbium (Yb)"
  ],
  [
   "71",
   "Lutetium (Lu)"
  ],
  [
   "72",
   "Hafnium (Hf)"
  ],
  [
   "73",
   "Tantalum (Ta)"
  ],
  [
   "74",
   "Tungsten (W)"
  ],
  [
   "75",
   "Rhenium (Re)"
  ],
  [
   "76",
   "Osmium (Os)"
  ],
  [
   "77",
   "Iridium (Ir)"
  ],
  [
   "78",
   "Platinum (Pt)"
  ],
  [
   "79",
   "Gold (Au)"
  ],
  [
   "80",
   "Mercury (Hg)"
  ],
  [
   "81",
   "Thallium (Tl)"
  ],
  [
   "82",
   "Lead (Pb)"
  ],
  [
   "83",
   "Bismuth (Bi)"
  ],
  [
   "84",
   "Polonium (Po)"
  ],
  [
   "85",
   "Astatine (At)"
  ],
  [
   "86",
   "Radon (Rn)"
  ],
  [
   "87",
   "Francium (Fr)"
  ],
  [
   "88",
   "Radium (Ra)"
  ],
  [
   "89",
   "Actinium (Ac)"
  ],
  [
   "90",
   "Thorium (Th)"
  ]
 ]
}