Bromine has 35 protons. It is a non-metallic element that is part of the group of elements in the periodic table known as halogens. In addition to mercury, it is the only other element that exists in liquid form at room temperature.
Bromine's name originates from the Greek word "bromos," which means "stench," and this reddish-brown liquid does indeed have an unpleasant odor. As an element, it is toxic, causing burns to exposed skin. Bromine is utilized in fire-retardant compounds and was once used in leaded gasoline. It is the 10th most common element in sea water and the 64th most prevalent in the earth's crust.