Sort the order of the electron holding capacity of the energy levels starting from the nucleus.

Below is a sequence of events. Place them in the order they should occur, number 1 being the first item. Select the step number from the drop down next to each item.
Items to order:
1.
Can hold a maximum of 18 electrons.

2.
Can hold a maximum of eight electrons.

3.
Can hold a maximum of 32 electrons.

4.
Can hold a maximum of two electrons.