Which of the following best explains why the bright-line emission spectrum of a pure…
PHYSICS · Single correct · A Level · Physics · Particles and radiation · Particles and radiation
Problem
Which of the following best explains why the bright-line emission spectrum of a pure element can be used to identify that element?
(a) Electrons in all elements are spaced at equal energy intervals, but the spacing depends on temperature rather than on the element itself.
(b) Atoms of different elements emit a continuous spectrum when heated; only the intensity pattern varies from one element to another.
(c) Each element possesses a unique set of allowed electron energy differences, so the wavelengths emitted are characteristic only of that element.
(d) Spectral lines arise from interactions between neighboring atoms, so the lines depend primarily on the gas pressure, not on the element.