# What electron pattern do you notice for all of the elements belonging to the Alkali Metal family?

Jan 1, 2017

See the explanation.

#### Explanation:

All of the alkali metals (group 1/IA) have a single valence electron in their highest energy s sublevel. This makes them very reactive.

$\text{Li} :$"1s"^2color(red)("2s"^1")

$\text{Na} :$"1s"^2"2s"^2"2p"^6color(red)("3s"^1)

$\text{K} :$"1s"^2"2s"^2"2p"^6"3s"^2"3p"^6color(red)("4s"^1)

$\text{Rb} :$"1s"^2"2s"^2"2p"^6"3s"^2"3p"^6"3d"^(10)"4s"^2"4p"^6color(red)("5s"^1)

$\text{Cs} :$"1s"^2"2s"^2"2p"^6"3s"^2"3p"^6"3d"^(10)"4s"^2"4p"^6"4d"^10"5s"^2"5p"^6color(red)("6s"^1)