2-Sobre os elétrons
A) possuem cargas positivas e massa elevada
B) possuem cargas positivas e massa, praticamente desprezível
C) possuem cargas negativas e massa, praticamente desprezível
D) possuem cargas negativas e massa elevada
3-Sobre os prótons
A) possuem cargas positivas e massa elevada
B) possuem cargas positivas e massa, praticamente desprezível
C) possuem cargas negativas e massa, praticamente desprezível
D) Possuem cargas negativas e massa elevada
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