# Electric force in simple atom

#### Dell

a simple atom is comprised of one electron and one proton, with a distance of R=0.5*10-10m between them

1) what is the electric force between them

F=K(qq)/r2 = 28.8N
------------------------------

2)how much smaller than the electric force is:
a) the gravitational force of the electron
b) the gravitational force of the proton

are the 2 gravitational forces not the same? is the force not equal to G(mpme)/R2 for both of them?

Related Introductory Physics Homework Help News on Phys.org

#### Doc Al

Mentor
a simple atom is comprised of one electron and one proton, with a distance of R=0.5*10-10m between them

1) what is the electric force between them

F=K(qq)/r2 = 28.8N
Better double check your arithmetic. 28.8N is huge (for atomic particles).

2)how much smaller than the electric force is:
a) the gravitational force of the electron
b) the gravitational force of the proton
This is worded strangely. Perhaps they meant the gravitational force on the particles.

are the 2 gravitational forces not the same? is the force not equal to G(mpme)/R2 for both of them?
Right.

### Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving