The property of potential energy that distinguishes it from kinetic energy are Shape and position
Cl03 is a polyatomic ion with a charge of -1. So 2 of those brings that charge to -2. Ca=+2. So Ca=+2 and (Cl03)2= -2. This would balance out the equation. The final result would be Ca(ClO3)2
A bohr model shows all electrons in an element :)