In a dynamic random access memory $($DRAM$)$ computer chip, each memory cell chiefly consists of a capacitor for charge storage. Each of these cells represents a single binary$-$bit value of $1$ when its $35-$fF

capacitor $(1$fF$=1015$F

$)$ is charged at $1\mathrm{.}5$ V

$,$ or $0$ when uncharged at $0$ VWhen it is fully charged, how many excess electrons are on a cell capacitor's negative plate

$.$