The Bohr theory explains that an emission spectral line is due to an electron losing energy and changing shells.

Question

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The Bohr theory proposed that electrons orbit the nucleus in specific shells or energy levels. When an electron jumps from a higher energy level to a lower one, it emits a photon of a specific wavelength, which produces a spectral line. This process is known as emission. Therefore, the Bohr theory explains that an emission spectral line is due to an electron losing energy and changing shells.

The Bohr Theory Explains That an Emission Spectral Line Is