How To Represent Electronic Configuration

The arrows represents the electrons orbiting each sublevel. Arrows are drawn in opposite directions. As you can see each sublevel has a different shape. This is because the sublevel, s has a single orbital creating a spherical shape. However the p sublevel is made up of 3 identical dumbbell shaped orbitals, each of which sits on its own axis, 90* from the orbital previous.

As you can see the sublevel d has 5 different shaped orbitals therefore can hold up to 10 electrons.