P orbitals

P orbitals are elongated and shaped like dumbbells.
They have non-uniform charge density.
There are 3 p orbitals in each p subshell - these are sometimes labelled as \(p_x\), \(p_y\) and \(p_z\) according to the axes along which they are oriented.
The p orbitals within a subshell differ only in their orientation - they are at mutual right angles.

The diagram below shows a one of the ways in which p orbitals can be represented.

Other orbitals

You do not need to know the shapes of d or f orbitals

There can be up to two electrons in each orbital. Therfore:

An s subshell can have two electrons.
A p subshell can have up to six electrons (Two in each of the three p orbitals)
D subshell can have up to ten.
The first quantum shell can have two electrons - It only has the 1s orbital
The second quantum shell can have eight electrons - Two in the 1s orbital, two in the 2s orbital and two more in each of the p orbitals
The third quantum shell can have up to 18 - The 18 that the second quantum shell can have, plus two more in each of the five d orbitals
The fourth quantum shell can have up to 32 - 14 more than third quantum shell to seven f orbitals.

Electron Configuration