Answer:
[tex]1.6\times 10^{-18} C[/tex]
Explanation:
The fundamental charge of a single electron is [tex]1.6\times 10^{-19} C[/tex].
If there are 10 excess electrons, the net charge that would be measured should be 10 times the fundamental charge of a single electron:
[tex]Q=nq_e\\Q= 10\times 1.6\times 10^{-19} C\\Q= 1.6 \times 10^{-18} C[/tex]