Argon:

1s22s22p63s23p6

Potassium:

1s22s22p63s23p64s1

= [Ar]

[Ar]4s1

noble gas notation

[Ar]

Noble Gas Notation

[Ne] [Ar] [Kr] [Xe] [Rn]

noble gases

[He]

PracticeWrite electron configurations for the following elements using noble gas notation:

1. Si

2. Au

3. Ar

[Ne]3s23p2

[Xe]6s24f145d9

[Ne]3s23p6