Question

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

Answer 1

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 `1s^2 2s^1`
Na `1s^2 2s^2 2p^6 3s^1`
K `1s^2 2s^2 2p^6 3s^2 3p^6 4s^1`

Each Alkalai Metal ends in `s^1` with 1 valence electron.

I hope this was helpful.
SMARTERTEACHER