APFIVE Atomic Energy Level Transition
A single-electron atom has energy levels given by $$E_n = -Z^2(13.6 \ \mathrm{eV})/n^2$$. If a photon with energy 30.6 eV is absorbed by this atom initially in its ground state, what is the atomic number $$Z$$ of this atom?
A
Z = 3
B
Z = 2
C
Z = √3
D
Z = 4
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