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Exercice'n°1':'Connaître'les'pictogrammes'de'sécurité'(sur'2,5'points)'
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Exercice'n°2':'Composition'atomique'et'structure'électronique'(sur'7'points)'
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Exercice'n°3':'L’azote'(sur'6,5'points)'
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Exercice'n°4':'Analyse'sanguine'(sur'4'points)'
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Exercice'bonus'(ou'défi)':'L’atome'de'cuivre'
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