When a piece of aluminum foil is dropped into a test tube containing liquid bromine (Br) a powerful exothermic reaction begins. The aluminum in the test tube actually melts because of the heat and can be seen flying outwards as white-hot drops. The cloud of orange-red gas is vaporized bromine. The reaction eventually forms aluminum bromide (AlBr3).
Source: https://youtu.be/ZpQkgM0msj4
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