In 2012, the median income of retiree aged units (with no earnings from work) age 65 and over with pensions and Social Security was more than twice the income of aged units receiving only Social Security.
EXAMPLE:: Assign a formal charge to the nitrogen in the compound shown below. 1  Nitrogen is in group five; thus, it has five valence electrons. 2  Number of non-bonding electrons: there are no non-bonding electrons, so this is zero.
1 There are three bonding pairs of electrons and one non bonding pair. 2  The bond angle in a molecule of ammonia are 107, a value very close to tetrahedral angle (109 o .5 3  '). We can write a general tetrahedral structure for the electron pairs of ammonia by placing the non bonding pair at one corner.