Coulomb's Law Calculation: Electric Force between Electron and Potassium Nucleus

[themadhatter1]

Homework Statement

An electron is separated from a potassium nucleus (charge 19e) by a distance of 5.2 X 10^-10m. what is the electric force between these particles? (e = 1.60 X 10^-19C, K_c= 8.99 X 10⁹ N*m²/C²)

Homework Equations

F_electric= K_c[(q₁)(q₂)/r²]

The Attempt at a Solution

F_electric= 8.99 X 10⁹[(19e)(-1.6 X 10^-19)/(5.2 X 10^-10)²]

F_electric= -1.62 X 10^-8

Is this correct?

 

[Jack_O]

Yeah looks good, don't forget your units though.