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Spin-orbital




The spinorbital of a single Electron , for example, is a complex-valued function of four real variables: the three scalars used to define its position, and a fourth scalar, ''ms'', which can be either +1/2 or −1/2:
:\chi(x, y, z, m_s)
We can also write it more compactly as a function of a position vector ec r=(x,y,z) and the quantum number ''ms'':
:\chi( ec r, m_s).
For a general particle with spin ''s'', ''ms'' can take values between −''s'' to ''s'' in integer steps. The electron has ''s''=1/2.

A spinorbital is usually ''normalized,'' such that the probability of finding the particle anywhere in space with any spin is equal to 1:

  :<math>P(V,m S) \int_{V}d^3 ec r\\chi( ec r,m_s)^2</math>