The right-hand group is in the visible range and is part of the Balmer series.
The left-hand group is in the ultraviolet region and belongs to the Lyman series.
Spectral lines like these can be used in the identification of unknown
specimens.
Mass Spectroscopy
Another tool used to identify specific atomic structures is mass spectroscopy,
which is based on the concept that differences in mass cause differences in the
degree of bending that occurs in a beam of ions passing through a magnetic field.
This is shown in Figure 7.
TIP
A mass spectroscope separates isotopes of the same element based on differences in their
mass.Figure 7. Mass SpectroscopeThe intensity on the photographic plate indicates the amount of each
particular isotope. Other collectors may be used in place of the photographic