Here's why:

* Electrons orbit the nucleus: Electrons are negatively charged particles that orbit the positively charged nucleus of an atom. They are held in place by electrostatic forces.

* Loosely bound: The outermost electrons (valence electrons) are relatively loosely bound to the atom. They can be easily gained, lost, or shared with other atoms.

* Transfer of charge: When an electron moves from one atom to another, it results in a transfer of charge. This is the basis of chemical bonding and electrical conductivity.

Examples:

* Ionic bonding: Atoms gain or lose electrons to form ions with opposite charges, which then attract each other.

* Covalent bonding: Atoms share electrons to form a stable molecule.

* Electrical current: Electrons flow through a conductor, carrying an electrical current.

While protons and neutrons reside in the nucleus of an atom, they are much more tightly bound and generally don't move to other objects under normal conditions.