91Ó°ÊÓ

We need to find electron arrangement for carbon

Atomic number carbon = $6$

Symbol = $C$

Electron arrangement = $2,6$

Hence, electron arrangement of carbon is $2,6$.

We need to find electron arrangement for argon.

Atomic number argon =$18$

Symbol =$Ar$

Electron arrangement =$2,8,8$

Hence, electron arrangement of carbon is$2,8,8$.

We need to find electron arrangement for potassium.

Atomic number potassium =$19$

Symbol =$K$

Electron arrangement = $2,8,8,1$

Hence, electron arrangement of potassium is$2,8,8,1$.

We need to find electron arrangement for silicon.

Atomic number silicon =$14$

Symbol =$Si$

Electron arrangement =$2,8,4$

Hence, electron arrangement of silicon is$2,8,4$.

We need to find electron arrangement for helium.

Atomic number helium =$2$

Symbol =$He$

Electron arrangement = $2$

Hence, electron arrangement of helium is$2$.

We need to find electron arrangement for nitrogen.

Atomic number nitrogen =$7$

Symbol =$N$

Electron arrangement =$2,5$

Hence, electron arrangement of nitrogen is$2,5$.