Auranium and iron atom reside a distance r = 37.50 nm apart. the uranium atom is singly ionized; the iron atom is doubly ionized. calculate the distance r from the uranium atom necessary for an electron to reside in equilibrium. ignore the insignificant gravitational attraction between the particles. also, what is the magnitude of the force on the electron from the uranium ion?

r=15.53 nm

Explanation:

Lets take electron is in between iron and uranium

Charge on electron

Charge on iron

Charge on uranium

We know that force between two charge

For equilibrium force between electron and iron should be force between electron and  uranium

Lets take distance between electron and  uranium is r so distance between electron and iron will be 37.5-r nm

Now by balancing the force

So r=15.53 nm

So force