What is the magnitude of the electrostatic force
between two electrons separated by a distance of
1.00 × 10^–8 meter?
(1) 2.56 × 10^–22 n (3) 2.30 × 10^–12 n
(2) 2.30 × 10^–20 n (4) 1.44 × 10^–1 n

     The electron charge is called the Elementary Charge, given by:


 
     The Eletrostatic Force bewteen two changes is giver by Coulomb Law:


 
     Substituing the unknowns, we have:



If you notice any mistake in my english, please let me know, because i am not native.

Iwould say a is accurate