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What color does Ba²⁺ produce in a flame?

Red

Green

Barium ions (Ba²⁺) produce a green color when subjected to a flame test. This characteristic is due to the excitation of electrons in the barium atoms. When barium is heated, the energy from the flame excites its electrons to higher energy levels. As these electrons return to their original state, they emit light in the visible spectrum. The specific wavelengths of light emitted correspond to the energy differences between the excited and ground state of the barium atoms, resulting in the distinct green color observed during the flame test.

This property is widely used in analytical chemistry to identify the presence of barium in a sample, as the green flame provides a clear visual indication.

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Yellow

Lilac

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