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.
The electron configuration of a neutral sodium atom is 1s22s22p63s1. In this configuration we note that there is only one electron in the 3rd energy level. Atoms prefer to gain the stability of octet, by having eight electrons in the outer shell, the electrons of the s and p orbitals. These are referred to as the valence orbitals and the valence electrons. In the case of sodium the one lone electron in the 3s valence shell would easily be released in order for sodium to have a filled valence shell at 2s22p6. Therefore , the electron configuration of the sodium ion is. 1s22s22p6.