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 (1fF=10−15F) is charged at 1.5 V, or 0 when uncharged at 0 V. When it is fully charged, how many excess electrons are on a cell capacitor's negative plate?