Magnesium-24

__ Magnesium __ Magnesium is an Alkaline Earth element of the periodic table. This means that it is a metallic element found in the second group of the periodic table. Magnesium is one of the six Alkaline Earth elements.   This is Magnesium is its natural state (top) and broken down (bottom). Also, magnesium's element symbol is Mg. Magnesium has an atomic number of 12. It has an atomic mass of 24. This means that one atom of magnesium has 12 protons, 12 neutrons and 12 electrons. Below is a photo of a model of an atom of magnesium:  This is a model of one atom of magnesium. The protons are purple, the neutrons are pink and the electrons are light pink on the outside. Magnesium's density is 1.738 grams per cm 3. Since water's density is 1 gram per cm3 magnesium will sink in water. Magnesium can be used in airplanes and missiles. Also, Sir Humphrey Davy discovered Magnesium.