Assertion: hydrogen atom's ground state | /r/HasProperty | x2-y2 orbitals
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Source sentences:
text: Excitations of copper 3d orbitals on the CuO2-plane of a high Tc superconductor; The ground state (blue) is x2-y2 orbitals; the excited orbitals are in green; the arrows illustrate inelastic x-ray spectroscopy