Arrange the following elements in order of increasing first ionization energy.

Mg, Al, Si, P, S

The answer to your question is Al, Mg, Si, S, P

Explanation:

First ionization energy is the energy necessary to remove an electron from an atom in a gaseous form.

Element First ionization energy (kJ/mol)

Magnesium 737.7

Aluminum 577.5

Silicium 786.5

Phosphorus 1011.8

Sulfur 999.6

Order: Al, Mg, Si, S, P