The energy of the n^{th} sate in the hydrogen atom,

$\overline{)\begin{array}{rcl}{\mathbf{E}}_{\mathbf{n}}& {\mathbf{=}}& \mathbf{-}\frac{\mathbf{13}\mathbf{.}\mathbf{6}}{{\mathbf{n}}^{\mathbf{2}}}\end{array}}$

The ground state of the hydrogen atom electron is n = 1. All other states of n greater than 1 are called excited states. The excited states are unstable and fall back to lower energy levels emitting radiation.

A)

In Balmer series, the electrons fall back to n = 2 and are visible.

Are there transitions of higher or lower energy for hydrogen that we don't see?

How may total transitions are there for hydrogen? Please provide at least one example.

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