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Unformatted text preview: Spin Quantum Number ( s ): The spin quantum number tells whether a given electron is spin up (+1/2) or spin down (-1/2). An orbital contains two electrons, and each of those electrons must have different spins. Orbital Energy Diagrams It is often convenient to depict orbitals in an orbital energy diagram, as seen below in . Such diagrams show the orbitals and their electron occupancies, as well as any orbital interactions that exist. In this case we have the orbitals of the hydrogen atom with electrons omitted. The first electron shell ( n = 1) contains just the 1s orbital. The second shell ( n = 2) holds a 2 s orbital and three 2 p orbitals. The third shell ( n = 3) holds one 3 s orbital, three 3 p orbitals, and five 3 d orbitals, and so forth. Note that the relative spacing between orbitals becomes smaller for larger n. In fact, as n gets large the spacing becomes infinitesimally small....
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- Fall '10