The median Social Security benefit was $16,295 for men and $11,999 for women in 2012, AARP found. Retirement savings. Just under a third (30 percent) of retirees receive income from either a traditional pension or take withdrawals from a retirement savings account such as a 401(k) or individual retirement account.
The Sodium atom. 1  The Na atom has an equal number of electrons and protons (11 e-and 11 p+). 2  This atom too is unstable because the outer valance shell of electrons has only one electron in it. 3  To be stable the outer shell of electrons should have eight electrons.
Subtract the number of electrons from the number of protons. In an atom, each proton has a charge of +1, each electron a charge of -1, and each neutron has no charge. If there's one more proton than electron, the overall charge is +1. An example of this is a sodium ion. The ion has 11 protons, but only 10 electrons, so 11-10 = +1.