About the element:
Magnesium has an atomic number of 12 so it has 12 protons.
And it's mass is 24.305
Before the expirement
This is the metal, magnesium, before putting on the Bunsen Burner.
Before burning the Metal
This is right before the metal went on to the burner.
After the expirement
This is what happened to the metal after it was lit on the Bunsen burner.