1. Find the energy of the electron in the ground state of doubly inozed lithium, which has an atomic number Z = 3. Answer in units of eV.

2. Find the radius of its ground-state orbit. Answer in units of nm.

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E = -13.6z^2/n^2

E1 = -13.6*9 = 122.4eV

r= a0/z = 0.0529/3 = 0.0176 nm

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