IN view of the considerable attention given to the secondary spectrum of hydrogen in recent investigations, it may be worth announcing that this spectrum has been extended photographically so far ...

For instance, one study examined the IR spectra of hydrogen-bonded complexes ... Hydrogen Bonding: A type of attractive interaction between a hydrogen atom bonded to a highly electronegative ...

It came when the one electron of the hydrogen atom transitioned from the 2P 1/2 energy level to the 2S 1/2 level. (The leftmost number is the principal quantum number, much like the discrete but ...