Emission spectrum of mercury

Emission spectrum of mercury


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Emission spectrum of mercury. When atoms of an element are excited (for instance by heating), they return to their state of lowest energy by emitting radiation at specific wavelengths. If this radiation is passed through a spectrometer, a spectrum is produced which displays the element's characteristic emission "lines". The lines are a unique "fingerprint" of an element. Mercury's predominant lines (right to left) are at 5791 & 5770 angstroms (yellow), 5461 (green), 4916 (cyan) & 4358 angstroms (blue). Many fainter lines are not visible in this photograph.

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