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.
Feb 11, 2015. Bromine atom has 7 valence electrons. For a main group element, a valence electron is an electron that has the highest principal quantum number, n. The electron configuration of Br is 1sÂ² 2sÂ²2pâ¶ 3sÂ²3pâ¶ 4sÂ²3dÂ¹â°4pâµ. The electrons with the highest quantum number are the 4sÂ²4pâµ electrons. Thus, Br has seven valence electrons.