Question

electric current exists when:
a) electrons flow from one atom to another
b) electrons flow around the orbit of the atom
c) protons flow from one atom to another
d) neutrons flow around the orbit of the atom

Explanation:

Electric current is the flow of electric charge. Electrons, which are negatively - charged particles, can move freely in conductors. When electrons flow from one atom to another in a circuit, an electric current is established. Protons are located in the nucleus and do not move freely to create current. Neutrons have no charge and also do not contribute to electric current. Electrons flowing around the orbit of an atom is a description of atomic electron behavior and not related to macroscopic electric current.

Answer:

A. Electrons flow from one atom to another