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The electron in a hydrogen atom with an energy of -0.544 eV is in a subshell...

The electron in a hydrogen atom with an energy of -0.544 eV is in a subshell with 18 states.

A. What is the principal quantum number, n, for this atom? n =

b. What is the maximum possible orbital angular momentum this atom can have? L=

c. Is the number of states in the subshell with the next lowest value of ℓℓ equal to 16, 14, or 12?

d. explain part (c.)

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