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Why are halogens coloured?

Asked by Topperlearning User 7th June 2016, 10:03 AM
Answered by Expert
Answer:

Halogens are coloured because of their low ionisation energy.

As a result, the electrons get excited in the visible region of light.

The remaining light falls in the visible region and halogens appear to be coloured.

For example: Fluorine absorbs wavelengths corresponding to violet light and the remaining light appears to be yellow. Thus, fluorine has a yellow colour. Similarly, chlorine is greenish yellow, bromine reddish and iodine is a violet solid.

 

Answered by Expert 7th June 2016, 12:03 PM
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