Here's why:

* Coulomb's Law: The force between two charged objects is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

* Electrons: Electrons have a negative charge.

* Like Charges Repel: Since electrons have the same charge, they repel each other.

* Inverse Square Law: The "inverse square" part of Coulomb's Law means that if you double the distance between the electrons, the force between them decreases by a factor of four (2 squared). If you triple the distance, the force decreases by a factor of nine (3 squared), and so on.

In conclusion, as the distance between two electrons increases, the repulsive force between them weakens significantly.