Connaissances en vrac ?.(sur 7 pts.) Ex n°2 : L'atome d'hélium (sur ...
© Hachette Livre, 2010 ? Physique Chimie 2de, Livre du professeur. 11. CHIMIE. Exercices ... nova, une super- nova, une étoile à neutron ou un ... La première étape ...
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