Electron configuration of boron

The electronic configuration of the element boron, with atomic number 5, is

1s² 2s² 2p¹.

Shell 1:

Subshell s:

The first shell of boron contains two electrons in the 1s orbital, and it has a maximum capacity of two electrons.

Subshell s:

Boron fills the second shell’s two available electron slots in the 2s orbital with two electrons each.

Subshell p:

The p subshell is an additional subshell that is part of the second shell. One electron is present in the 2p orbital of boron.