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As may be seen in the microscopic view of liquid bromine, 1  Liquids are made up of very small particles (atoms, molecules, and/or ions). 2  The particles that make up a liquid: 3  are close together with no regular arrangement,  vibrate, move about, and slide past each other.
bromine (Br) a corrosive, toxic red-brown liquid element of the halogen group. Its atomic number is 35; its atomic mass is 79.904. It exists naturally as a diatomic molecule, Br2. Bromine is used in industry, in photography, in the manufacture of organic chemicals and fuels, and in medications. Bromine gives off a red vapor that is extremely irritating to the eyes and the respiratory tract.