What is the electron configuration of an element with atomic number 19?
This is the electron configuration of Potassium K # 19
There are 2 electrons in the first shell
There are 8 electrons in the second shell
There are 8 electrons in the third shell
leaving only 1 electron in the fourth and valence shell.
This results in ionized potassium almost always having a charge of
#K -> K^(+) + e^(-)#