Ecrit par ✅ Quiz : Stabilite Et Instabilite Du Noyau
Ce quiz contient 20 questions.
Note : Placeholder pour valider la structure. Le JSON converti est conservé ci-dessous pour l’import final des vraies questions Tutor LMS.
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{
"quiz_title": "Stabilite Et Instabilite Du Noyau",
"quiz_slug": "02_stabilite_et_instabilite_du_noyau_quiz",
"quiz_description": "Quiz Edu509 : Stabilite Et Instabilite Du Noyau",
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"questions": [
{
"question_order": 1,
"question_title": "Quel est le nombre de neutrons dans le noyau de l’azote 15 \\\\(_7^{15}N\\\\) ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
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"question_description": "",
"question_explanation": "Le nombre de neutrons se calcule par \\\\(N = A - Z = 15 - 7 = 8\\\\).",
"answers": [
{
"answer_title": "8",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "7",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "15",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "22",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 2,
"question_title": "Le noyau \\\\(_{17}^{35}Cl\\\\) a-t-il un excès de neutrons ou de protons par rapport à la vallée de stabilité ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Pour \\\\(Z = 17\\\\), la vallée de stabilité est autour de \\\\(N/Z \\\\approx 1,2\\\\). Ici, \\\\(N = 35 - 17 = 18\\\\), donc \\\\(N/Z = 18/17 \\\\approx 1,06\\\\), ce qui indique un léger excès de protons.",
"answers": [
{
"answer_title": "Excès de neutrons",
"is_correct": false,
"answer_order": 1
},
{
"answer_title": "Excès de protons",
"is_correct": true,
"answer_order": 2
},
{
"answer_title": "Nombre équilibré",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "Impossible à déterminer",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 3,
"question_title": "Quel type de radioactivité subit principalement le césium 137 \\\\(_{55}^{137}Cs\\\\) ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
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"question_description": "",
"question_explanation": "Le césium 137 a un excès de neutrons (\\\\(N/Z \\\\approx 1,49\\\\)), il subit donc une radioactivité bêta moins.",
"answers": [
{
"answer_title": "Radioactivité alpha",
"is_correct": false,
"answer_order": 1
},
{
"answer_title": "Radioactivité bêta moins (\\\\(\\\\beta^-\\\\))",
"is_correct": true,
"answer_order": 2
},
{
"answer_title": "Radioactivité bêta plus (\\\\(\\\\beta^+\\\\))",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "Fission spontanée",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 4,
"question_title": "Quelle est l’équation de désintégration bêta moins du strontium 90 \\\\(_{38}^{90}Sr\\\\) ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "En radioactivité bêta moins, le nombre de masse reste constant et le numéro atomique augmente de 1 : \\\\(_{38}^{90}Sr \\\\rightarrow _{39}^{90}Y + e^- + \\\\overline{\\\\nu}_e\\\\).",
"answers": [
{
"answer_title": "\\\\(_{38}^{90}Sr \\\\rightarrow _{39}^{90}Y + e^- + \\\\overline{\\\\nu}_e\\\\)",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "\\\\(_{38}^{90}Sr \\\\rightarrow _{37}^{90}Rb + e^+ + \\\\nu_e\\\\)",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "\\\\(_{38}^{90}Sr \\\\rightarrow _{36}^{86}Kr + _2^4He\\\\)",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "\\\\(_{38}^{90}Sr \\\\rightarrow _{38}^{90}Sr + \\\\gamma\\\\)",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 5,
"question_title": "Quel est le défaut de masse (en u) du noyau \\\\(_{3}^{7}Li\\\\) sachant que \\\\(m_p = 1,007825\\\\) u, \\\\(m_n = 1,008665\\\\) u, \\\\(m_{noyau} = 7,016003\\\\) u ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Défaut de masse : \\\\(\\\\Delta m = 3 \\\\times 1,007825 + 4 \\\\times 1,008665 - 7,016003 = 3,023475 + 4,03466 - 7,016003 = 7,058135 - 7,016003 = 0,042132\\\\) u.",
"answers": [
{
"answer_title": "0,042132",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "0,016003",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "0,049995",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "0,007825",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 6,
"question_title": "Pour le noyau \\\\(_{20}^{40}Ca\\\\), quel est le rapport \\\\(N/Z\\\\) ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Pour \\\\(_{20}^{40}Ca\\\\), \\\\(N = 40 - 20 = 20\\\\), donc \\\\(N/Z = 20/20 = 1\\\\).",
"answers": [
{
"answer_title": "1",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "2",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "0,5",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "1,5",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 7,
"question_title": "Quel noyau fils obtient-on après une désintégration alpha du radium 226 \\\\(_{88}^{226}Ra\\\\) ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Après une désintégration alpha, \\\\(A\\\\) diminue de 4 et \\\\(Z\\\\) de 2 : \\\\(_{88}^{226}Ra \\\\rightarrow _{86}^{222}Rn + _2^4He\\\\).",
"answers": [
{
"answer_title": "\\\\(_{86}^{222}Rn\\\\)",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "\\\\(_{90}^{230}Th\\\\)",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "\\\\(_{87}^{222}Fr\\\\)",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "\\\\(_{88}^{222}Ra\\\\)",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 8,
"question_title": "Le noyau \\\\(_{6}^{14}C\\\\) est-il stable ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Le carbone 14 a un excès de neutrons (\\\\(N/Z \\\\approx 1,33\\\\)), il est donc instable et subit une radioactivité bêta moins.",
"answers": [
{
"answer_title": "Non, il est instable",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "Oui, il est stable",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "Il subit une fission spontanée",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "Il subit une désintégration alpha",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 9,
"question_title": "Quel est le nombre de masse \\\\(A\\\\) d’un noyau ayant 15 protons et 16 neutrons ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Le nombre de masse est \\\\(A = Z + N = 15 + 16 = 31\\\\).",
"answers": [
{
"answer_title": "31",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "1",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "16",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "15",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 10,
"question_title": "Laquelle des affirmations suivantes est vraie concernant la vallée de stabilité ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "La stabilité dépend du rapport \\\\(N/Z\\\\) qui doit être proche de la vallée de stabilité, surtout pour les noyaux stables.",
"answers": [
{
"answer_title": "Les noyaux stables ont un rapport \\\\(N/Z\\\\) proche de la vallée de stabilité",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "Tous les noyaux avec \\\\(N = Z\\\\) sont stables",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "Les noyaux lourds ont toujours \\\\(N/Z = 1\\\\)",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "La vallée de stabilité concerne uniquement les isotopes légers",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 11,
"question_title": "Quel type de radioactivité permet à un noyau avec un excès de protons de se rapprocher de la stabilité ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Un excès de protons se corrige par une radioactivité bêta plus (\\\\(\\\\beta^+\\\\)), qui transforme un proton en neutron.",
"answers": [
{
"answer_title": "Radioactivité bêta plus (\\\\(\\\\beta^+\\\\))",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "Radioactivité bêta moins (\\\\(\\\\beta^-\\\\))",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "Radioactivité alpha",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "Fission",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 12,
"question_title": "Quelle est l’énergie de liaison totale (en J) d’un noyau ayant un défaut de masse de \\\\(2,0 \\\\times 10^{-27}\\\\) kg ? (\\\\(c = 3,00 \\\\times 10^8\\\\) m/s)",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "L’énergie de liaison est \\\\(E = \\\\Delta m \\\\times c^2 = 2,0 \\\\times 10^{-27} \\\\times 9,0 \\\\times 10^{16} = 1,8 \\\\times 10^{-10}\\\\) J.",
"answers": [
{
"answer_title": "1,8 \\\\times 10^{-10}",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "6,0 \\\\times 10^{-19}",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "2,0 \\\\times 10^{-27}",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "9,0 \\\\times 10^{-11}",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 13,
"question_title": "Après une désintégration bêta plus du sodium 22 \\\\(_{11}^{22}Na\\\\), quel est le noyau fils ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "En bêta plus, \\\\(Z\\\\) diminue de 1 et \\\\(A\\\\) reste constant : \\\\(_{11}^{22}Na \\\\rightarrow _{10}^{22}Ne + e^+ + \\\\nu_e\\\\).",
"answers": [
{
"answer_title": "\\\\(_{10}^{22}Ne\\\\)",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "\\\\(_{12}^{22}Mg\\\\)",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "\\\\(_{11}^{21}Na\\\\)",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "\\\\(_{11}^{22}Na\\\\)",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 14,
"question_title": "Quel est le nombre de nucléons dans le noyau \\\\(_{27}^{59}Co\\\\) ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Le nombre de nucléons est le nombre de masse \\\\(A = 59\\\\).",
"answers": [
{
"answer_title": "59",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "27",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "32",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "86",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 15,
"question_title": "Le plomb 208 \\\\(_{82}^{208}Pb\\\\) est-il stable ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Le plomb 208 est un noyau doublement magique et se trouve dans la vallée de stabilité. Il est stable.",
"answers": [
{
"answer_title": "Oui, il est stable",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "Non, il subit une désintégration alpha",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "Non, il subit une désintégration bêta moins",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "Non, il subit une désintégration bêta plus",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 16,
"question_title": "Quel est le nombre de neutrons dans le noyau \\\\(_{92}^{238}U\\\\) ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Le nombre de neutrons est \\\\(N = 238 - 92 = 146\\\\).",
"answers": [
{
"answer_title": "146",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "92",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "238",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "184",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 17,
"question_title": "Quel type de radioactivité subit principalement le polonium 210 \\\\(_{84}^{210}Po\\\\) ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Le polonium 210 est un noyau lourd, il subit principalement une radioactivité alpha.",
"answers": [
{
"answer_title": "Radioactivité alpha",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "Radioactivité bêta moins",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "Radioactivité bêta plus",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "Fission spontanée",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 18,
"question_title": "Pour la désintégration alpha du thorium 232 \\\\(_{90}^{232}Th\\\\), quel est le noyau fils ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Après une désintégration alpha, \\\\(A\\\\) diminue de 4 et \\\\(Z\\\\) de 2 : \\\\(_{90}^{232}Th \\\\rightarrow _{88}^{228}Ra + _2^4He\\\\).",
"answers": [
{
"answer_title": "\\\\(_{88}^{228}Ra\\\\)",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "\\\\(_{89}^{228}Ac\\\\)",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "\\\\(_{90}^{228}Th\\\\)",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "\\\\(_{92}^{236}U\\\\)",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 19,
"question_title": "Quel est le rapport \\\\(N/Z\\\\) du noyau \\\\(_{8}^{16}O\\\\) ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "Pour \\\\(_{8}^{16}O\\\\), \\\\(N = 16 - 8 = 8\\\\), donc \\\\(N/Z = 8/8 = 1\\\\).",
"answers": [
{
"answer_title": "1",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "2",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "0,5",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "1,5",
"is_correct": false,
"answer_order": 4
}
]
},
{
"question_order": 20,
"question_title": "Quelle transformation nucléaire conserve à la fois \\\\(A\\\\) et \\\\(Z\\\\) ?",
"question_type": "single_choice",
"question_mark": 1,
"answer_required": true,
"randomize_question": false,
"show_question_mark": true,
"question_description": "",
"question_explanation": "L’émission gamma ne modifie ni le nombre de masse ni le numéro atomique.",
"answers": [
{
"answer_title": "Émission gamma",
"is_correct": true,
"answer_order": 1
},
{
"answer_title": "Désintégration alpha",
"is_correct": false,
"answer_order": 2
},
{
"answer_title": "Désintégration bêta moins",
"is_correct": false,
"answer_order": 3
},
{
"answer_title": "Désintégration bêta plus",
"is_correct": false,
"answer_order": 4
}
]
}
]
}