Explain how atoms emit photons when excited electrons fall to lower energy levels, relate colour, wavelength, frequency and energy across the electromagnetic spectrum, and distinguish a continuous spectrum from a line spectrum.
Lithium can be identified in the light emitted by stars and by flames containing lithium compounds. (i) Outline the appearance of the emission spectrum of lithium. The emission spectrum of a one-electron species, such as the ion, can be explained…
Which electron transition in a hydrogen atom emits radiation with the longest wavelength? A. to B. to C. to D. to