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Leslie Contreras 1D
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Postby Leslie Contreras 1D » Sat Apr 28, 2018 9:59 pm

why can hydrogen spin either -1/2 or +1/2

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Re: H-atom

Postby Chem_Mod » Sun Apr 29, 2018 9:58 am

A Hydrogen atom is composed of a proton and an electron. Particles, such as electrons, protons, and neutrons, behave like spinning tops. The spin of these particles is an intrinsic quantum mechanical phenomenon and is responsible for many fundamental properties of matter, including the proton's magnetic moment.

The proton magnetic moment is much smaller than the electron magnetic moment, so the magnetic field in the ground state is dominated by that due to the electron, which is parallel to its spin, and is a dipole magnetic field.

But since both up and down spin would be present for a hydrogen atom, a typical hydrogen atom would have a magnetic field which averaged to zero.

These states can be split by the application of an external magnetic field, which will align the spins of the proton and electron with the field.

You will not be expected to know details about H-atom spins for this class.

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