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## Main Question or Discussion Point

For the ortho state of Helium, the spin part of the wavefunction is symmetric.

There are 3 possible symmetric wavefunctions we can construct from the 2 electrons' spins.

(^^)

(vv)

[1/SQRT2] { (^v) + (v^) }

I am confused as to why this last state gives a total spin of one? The electrons can only be in one of these eigenstates, both of equal probability of 1/2, but the spins are anti-aligned, are they not???

Thanks guys! (I hope you'll not mind my improvisation for electron spin functions with ^ and v !! :tongue: )

Cheers!

There are 3 possible symmetric wavefunctions we can construct from the 2 electrons' spins.

(^^)

(vv)

[1/SQRT2] { (^v) + (v^) }

I am confused as to why this last state gives a total spin of one? The electrons can only be in one of these eigenstates, both of equal probability of 1/2, but the spins are anti-aligned, are they not???

Thanks guys! (I hope you'll not mind my improvisation for electron spin functions with ^ and v !! :tongue: )

Cheers!