This is the question
Structure opposite comprises 5 ions each of which has lost one electron. The sides of the square formed by the 4 outer ions are of length 0.2nm
Ion E is at the midpoint
1.What is the force on A due to ion A?
I'd imagine: F= kq / r^2
The Attempt at a Solution
I used Pythagoras to get A to E which is 0.141nm which is r
but for the charge would I use 1.6*10^19 even though they've lost an electron?
9*10^9 * 1.6*10*-19 / (0.141*10^-6)^2
I don't think this is right