Question

An object gains 10 electrons. The charge on the object is
(1) +10 e (3) -10 e
(2) +1.6 x 10-18 C (4) -1.6 x 10-20 C
Proof: Explain your reasoning/show calculations.

Answer 1

$$Q=-10e=-10(1.6\cdot10^{-19})=-1.6\cdot10^{-18}C$$

Answer:  (3) -10 e