In a hypothetical 1-electron element that is not H, removing an electron (thus bringing it to the "infinite" level) requires 412 kJ/mol, when its electron is on the fundamental level (n = 1). However, when the electron of this atom is on n = 2, removing this electron requires only 126 kJ/mol. Using this information, calculate the wavelength (in nm) emitted when the electron passes from n = 2 to n = 1 in this hypothetical atom.

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Q: wavelength

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