I've just come across the spin states of a two electron system. There are 4 states possible and I am a little confused as to why the state below has values of s=1 m_s=0?(adsbygoogle = window.adsbygoogle || []).push({});

[1/√2]{α(1)β(2)+α(2)β(1)}

where α(i) and β(i) tell us if the particle has +ve or -ve z component of spin respectively.

I don't quite understand why s=1 as the sum of the spins for this would be (+1/2)(-1/2)+(+1/2)(-1/2)

http://www.tcm.phy.cam.ac.uk/~bds10/aqp/lec11_compressed.pdf a similar thing can be seen here on slide 10.

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# I Why is the spin of this state equal to one?

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