A Hydrogen Atom Consists of an Electron (With Negative Charge)

Multiple Choice

A hydrogen atom consists of an electron (with negative charge) orbiting a proton (with positive charge) . With the conventional definition of the reference position for electrostatic potential energy, the electrostatic potential energy for this system

A) is positive.
B) is zero.
C) is negative.
D) depends on how fast the electron is moving.