What is the electric field midway between an electron and a proton separated by 0.8 nm.

Don't know what formula to use. Nothing on line is helping me get to the correct answer. Appreciate anyone's help.
Thanks

To find the electric field midway between an electron and a proton, you can use the formula for the electric field due to a point charge. The formula is:

E = k * q / r^2

Where:
- E is the electric field
- k is the Coulomb's constant (approximately equal to 9 x 10^9 N m^2/C^2)
- q is the charge of the point charge
- r is the distance between the point charge and the point where you want to find the electric field

In this case, the distance between the electron and the proton is given as 0.8 nm, which is equal to 0.8 x 10^-9 m. The charges of the electron and proton are of equal magnitude but opposite sign, with each having a charge of approximately 1.6 x 10^-19 C.

Since you want to find the electric field midway between them, the distance (r) will be half of the total separation. Therefore, the distance will be 0.4 x 10^-9 m.

Now, you can plug these values into the formula:

E = (9 x 10^9 N m^2/C^2) * (1.6 x 10^-19 C) / (0.4 x 10^-9 m)^2

Simplifying this expression, you will get the value of the electric field.

Please note that the values of the charges used here are approximate values.