Answer:
Bright green
Explanation:
Halogens in ionic form, will react with copper wire. When heated in a flame, a wire that contains halogens will produce a bright, green flame.
The heating of halogens with the copper forms a bright green flame.
A flame test is given as the test for the identification of the elements with the analysis of the color of flame on burning.
The elements on heating are excited to higher energy levels, and when they return, they emit the absorbed radiation in the form of light. The halogens are ionic in nature, and with the flame test in the presence of the heated copper, they liberate bright green flame.
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