Question

Indique o número de prótons, nêutrons e elétrons presentes nos átomos:

a)   27 Co 58        

b)   48 Cd 112​

Answer 1

Resposta:

)

\begin{gathered}4 + \frac{2}{5} \\ \frac{20 + 2}{5} \\ = \frac{22}{5}\end{gathered}4+52520+2=522

b)

\begin{gathered}4 - \frac{2}{5} \\ \frac{20 - 2}{5} \\ = \frac{18}{5}\end{gathered}4−52520−2=518

c)

\begin{gathered}7 \times \frac{3}{4} \\ = \frac{21}{4}\end{gathered}7×43=421