To determine whether people have worked enough to meet the requirements, the SSA requires people to earn a certain number of work credits. Work credits are essentially income that is assigned a value. In general, you must have accumulated 40 work credits (20 in the past 10 years) to be eligible for disability.
Bromine is a chemical element with symbol Br and atomic number 35. It is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas. Its properties are thus intermediate between those of chlorine and iodine.
Atomic Weight: 79.904. Density: 3.125 g/cc. Melting Point: -7 degrees C; Boiling Point 58.8 degrees C. Bromine is a reddish-brown heavy volatile liquid and is a member of the halogen group of elements along with fluorine, chlorine and iodine.