What is the valence electron configuration for potassium?

1 Answer
Mar 7, 2014

Answer:

K = #1s^2 2s^2 2p^6 3s^2 3p^6 4s^1#.
This simplifies to a noble gas notation of:K = #[Ar] 4s^1#

Explanation:

Potassium (K) is an Alkali metal found in the first column (Group I) and in the fourth row (period 4) of the periodic table. All alkali metals end in #s^1# for their electron configuration.

The total electron configuration for potassium is

K = #1s^2 2s^2 2p^6 3s^2 3p^6 4s^1#

This simplifies to a noble gas notation of

K = #[Ar] 4s^1#

We use the symbol for argon (Ar) because it is the last noble gas in the period (row) above potassium on the periodic table.

The valence electrons are the highest energy level s and p orbital electrons of the atom. This would mean potassium has a valence shell of #4s^1#

I hope this was helpful.
SMARTERTEACHER