Question

2=n.1,6x10^-19 qual e o numero de eletrons

Answer 1

$2=n\times1.6\times10^{-19}\ \to\ 2=n\times16\times10^{-20}\ \to\\\\ \to\ n=\dfrac{2}{16\times10^{-20}}=\dfrac{1}{8}\times10^{20}=0.125\times10^{20}\ \to\\\\ \to\ \boxed{n=1.25\times10^{19}\ e^{-}}$