Elemental bromine is a fuming red-brown liquid at room temperature, corrosive and toxic, with properties between those of chlorine and iodine.he diatomic element Br 2 does not occur naturally. Instead, bromine exists exclusively as bromide salts in diffuse amounts in crustal rock. Owing to leaching, bromide salts have accumulated in sea water at 65 parts per million (ppm), which is less than chloride.
As always, follow proper cooking instructions when preparing any meat to kill any potentially harmful bacteria. As long as you have your refrigerator at a reasonable temperature, your roast beef should be fine through the weekend at least. There's no reason you can't serve it hot if you want. Reheat it with some broth or just slice it and have it cold on a salad or in a sandwich.
1 How long does ground beef last in the fridge once it is cooked? 2  Cooked ground beef will usually stay good for 3 to 4 days in the fridge and 3 months in the freezer. Unopened ground beef may be kept in its original store packaging when refrigerating; to maximize the shelf life of ground beef, do not open the package until ready to use.