Un atome de brome, de symbole Br posséde 80 nucléons. La charge de son noyau est
Q= 5.6 * 10⁻¹⁸ C.

Données : e= 1.6 * 10⁻¹⁹ C et m(neutron) m (proton) = 1.67 * 10⁻¹⁸ C.

Calculer la masse approchées de l'atome de Brome. Expliquer.
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