# How do valence electron configurations of the alkali metals compare with each other?

Feb 8, 2014

The Halogens (Li, Na, K, Rb, Cs, Fr) are found in column 1 or the first column of the 's' block of the periodic table. This means that each of these elements have an electron configuration that ends as ${s}^{1}$

Li $1 {s}^{2} 2 {s}^{1}$
Na $1 {s}^{2} 2 {s}^{2} 2 {p}^{6} 3 {s}^{1}$
K $1 {s}^{2} 2 {s}^{2} 2 {p}^{6} 3 {s}^{2} 3 {p}^{6} 4 {s}^{1}$

Each Alkalai Metal ends in ${s}^{1}$ with 1 valence electron.

I hope this was helpful.
SMARTERTEACHER