A parallel plate capacitor is charged until there are $109$ electrons on one of its plates. What is the net charge on the two plates?

Select answer from the options below

$-1\mathrm{.}6$ x $10-10$ C

$0$ C

$-3\mathrm{.}2$ x $10-10$ C

$+1\mathrm{.}6$ x $10-10$ C

$+3\mathrm{.}2$ x $10-10$ C