The particles in the nuceus of an atom are approximately 1.00times10^-15 m apart

Question

The particles in the nuceus of an atom are approximately 1.00times10^-15 m apart, while the electrons in an atom are about 1.00times10^-10m from the nucleus. Part A Calculate the electrical repulsion between two protons in a nucleus if they are 1.30times10^-15 m apart. Part B How many pounds would the force be? If you were holding these protons, do you think you could feel the effect of this force? calculate the electrical attraction that a proton in a nucleus exerts on an orbiting electron if the two particles are 1.34times10^-10 m apart.

Explanation / Answer

electrostatic force between any two charges is given by

F = K * q1 * q2 / r^2    (r is seperation distance)

charge of proton or electron is

q = 1.6 * 10^-19 C

part A

F = 9 * 10^9 * 1.6 * 10^-19 1.6 * 10^-19 / sqr(1.3 * 10^-15)

F = 136.33 N

part B

in pounds F = 30.648 pound

part D

F = - 9 * 10^9 * 1.6 * 10^-19 1.6 * 10^-19 / sqr(1.34 * 10^-10)

F = - 12.83 * 10^-9 N

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