[Fida]

Hello!
Can anyone please kindly assist me to understand something?
In chemistry the only prominent force which affects is electromagnetic force.
Now same charges repel ,opposite charges attract
Now when there is a force of attraction between two particles,the amount of energy required to separate them depends on the strength of the force and the distance between the centres of the two objects
The strength of the force depends on the size of the charges and how close the two centres are.
Does the size of the charges mean its magnitude? Or does it refer to the physical size of the ions?
Thanks!

[AWK]

We do not know an exact distribution of charge in nucleus, so we should use center of nucleus as starting point for a center of charge.

[Fida]

Thank you for replying!
ok I now know why we use the centre of the nucleus.But my main question is
does the size of the charges mean its magnitude? Or does it refer to the physical size of the ions?

[Borek]

does the size of the charges mean its magnitude?

Yes.

https://en.wikipedia.org/wiki/Coulomb%27s_law

[Fida]

Thanks
I take it you meant it depends on the physical size of atoms