The magnetic moment of an atom comes from the orbital motion of the electrons about the nucleus and also the rotational motion of each electron about their axes

The magnetic moment of an atom comes from the orbital motion of the electrons about the nucleus and also the rotational motion of each electron about their axes (called "spin"). In the case of a hydrogen atom there's one electron that contributes to the magnetic moment, which is how you're able to magnetically capture an electrically neutral atom.