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{"z":2,"symbole":"He","nom_fr":"Hélium","nom_en":"Helium","masse":4.0026,"famille":"Gaz noble","etat_std":"Gaz","periode":1,"groupe":18},
{"z":3,"symbole":"Li","nom_fr":"Lithium","nom_en":"Lithium","masse":6.94,"famille":"Métal alcalin","etat_std":"Solide","periode":2,"groupe":1},
{"z":4,"symbole":"Be","nom_fr":"Béryllium","nom_en":"Beryllium","masse":9.0122,"famille":"Métal alcalino-terreux","etat_std":"Solide","periode":2,"groupe":2},
{"z":5,"symbole":"B","nom_fr":"Bore","nom_en":"Boron","masse":10.81,"famille":"Métalloïde","etat_std":"Solide","periode":2,"groupe":13},
{"z":6,"symbole":"C","nom_fr":"Carbone","nom_en":"Carbon","masse":12.011,"famille":"Non-métal","etat_std":"Solide","periode":2,"groupe":14},
{"z":7,"symbole":"N","nom_fr":"Azote","nom_en":"Nitrogen","masse":14.007,"famille":"Non-métal","etat_std":"Gaz","periode":2,"groupe":15},
{"z":8,"symbole":"O","nom_fr":"Oxygène","nom_en":"Oxygen","masse":15.999,"famille":"Non-métal","etat_std":"Gaz","periode":2,"groupe":16},
{"z":9,"symbole":"F","nom_fr":"Fluor","nom_en":"Fluorine","masse":18.998,"famille":"Halogène","etat_std":"Gaz","periode":2,"groupe":17},
{"z":10,"symbole":"Ne","nom_fr":"Néon","nom_en":"Neon","masse":20.180,"famille":"Gaz noble","etat_std":"Gaz","periode":2,"groupe":18},
{"z":11,"symbole":"Na","nom_fr":"Sodium","nom_en":"Sodium","masse":22.990,"famille":"Métal alcalin","etat_std":"Solide","periode":3,"groupe":1},
{"z":12,"symbole":"Mg","nom_fr":"Magnésium","nom_en":"Magnesium","masse":24.305,"famille":"Métal alcalino-terreux","etat_std":"Solide","periode":3,"groupe":2},
{"z":13,"symbole":"Al","nom_fr":"Aluminium","nom_en":"Aluminium","masse":26.982,"famille":"Métal pauvre","etat_std":"Solide","periode":3,"groupe":13},
{"z":14,"symbole":"Si","nom_fr":"Silicium","nom_en":"Silicon","masse":28.085,"famille":"Métalloïde","etat_std":"Solide","periode":3,"groupe":14},
{"z":15,"symbole":"P","nom_fr":"Phosphore","nom_en":"Phosphorus","masse":30.974,"famille":"Non-métal","etat_std":"Solide","periode":3,"groupe":15},
{"z":16,"symbole":"S","nom_fr":"Soufre","nom_en":"Sulfur","masse":32.06,"famille":"Non-métal","etat_std":"Solide","periode":3,"groupe":16},
{"z":17,"symbole":"Cl","nom_fr":"Chlore","nom_en":"Chlorine","masse":35.45,"famille":"Halogène","etat_std":"Gaz","periode":3,"groupe":17},
{"z":18,"symbole":"Ar","nom_fr":"Argon","nom_en":"Argon","masse":39.948,"famille":"Gaz noble","etat_std":"Gaz","periode":3,"groupe":18},
{"z":19,"symbole":"K","nom_fr":"Potassium","nom_en":"Potassium","masse":39.098,"famille":"Métal alcalin","etat_std":"Solide","periode":4,"groupe":1},
{"z":20,"symbole":"Ca","nom_fr":"Calcium","nom_en":"Calcium","masse":40.078,"famille":"Métal alcalino-terreux","etat_std":"Solide","periode":4,"groupe":2},
{"z":26,"symbole":"Fe","nom_fr":"Fer","nom_en":"Iron","masse":55.845,"famille":"Métal de transition","etat_std":"Solide","periode":4,"groupe":8},
{"z":29,"symbole":"Cu","nom_fr":"Cuivre","nom_en":"Copper","masse":63.546,"famille":"Métal de transition","etat_std":"Solide","periode":4,"groupe":11},
{"z":30,"symbole":"Zn","nom_fr":"Zinc","nom_en":"Zinc","masse":65.38,"famille":"Métal de transition","etat_std":"Solide","periode":4,"groupe":12},
{"z":35,"symbole":"Br","nom_fr":"Brome","nom_en":"Bromine","masse":79.904,"famille":"Halogène","etat_std":"Liquide","periode":4,"groupe":17},
{"z":36,"symbole":"Kr","nom_fr":"Krypton","nom_en":"Krypton","masse":83.798,"famille":"Gaz noble","etat_std":"Gaz","periode":4,"groupe":18},
{"z":47,"symbole":"Ag","nom_fr":"Argent","nom_en":"Silver","masse":107.868,"famille":"Métal de transition","etat_std":"Solide","periode":5,"groupe":11},
{"z":50,"symbole":"Sn","nom_fr":"Étain","nom_en":"Tin","masse":118.710,"famille":"Métal pauvre","etat_std":"Solide","periode":5,"groupe":14},
{"z":53,"symbole":"I","nom_fr":"Iode","nom_en":"Iodine","masse":126.904,"famille":"Halogène","etat_std":"Solide","periode":5,"groupe":17},
{"z":54,"symbole":"Xe","nom_fr":"Xénon","nom_en":"Xenon","masse":131.293,"famille":"Gaz noble","etat_std":"Gaz","periode":5,"groupe":18},
{"z":79,"symbole":"Au","nom_fr":"Or","nom_en":"Gold","masse":196.967,"famille":"Métal de transition","etat_std":"Solide","periode":6,"groupe":11},
{"z":80,"symbole":"Hg","nom_fr":"Mercure","nom_en":"Mercury","masse":200.592,"famille":"Métal de transition","etat_std":"Liquide","periode":6,"groupe":12},
{"z":82,"symbole":"Pb","nom_fr":"Plomb","nom_en":"Lead","masse":207.2,"famille":"Métal pauvre","etat_std":"Solide","periode":6,"groupe":14},
{"z":86,"symbole":"Rn","nom_fr":"Radon","nom_en":"Radon","masse":222,"famille":"Gaz noble","etat_std":"Gaz","periode":6,"groupe":18},
{"z":92,"symbole":"U","nom_fr":"Uranium","nom_en":"Uranium","masse":238.029,"famille":"Actinide","etat_std":"Solide","periode":7,"groupe":null},
{"z":94,"symbole":"Pu","nom_fr":"Plutonium","nom_en":"Plutonium","masse":244,"famille":"Actinide","etat_std":"Solide","periode":7,"groupe":null},
{"z":118,"symbole":"Og","nom_fr":"Oganesson","nom_en":"Oganesson","masse":294,"famille":"Gaz noble (synthétique)","etat_std":"Inconnu","periode":7,"groupe":18}
]