Magnesium is located in the Alkaline earth metals, Group 2. It is a shiny silver coloured metal but often has a dull appearance due to tarnishing by its reaction with Oxygen to form Magnesium oxide. Magnesium is commonly used in flares and fireworks due to the bright white flame produced upon its combustion. It also has common uses as an antacid in its compound of Magnesium hydroxide. Magnesium is also important in the growth of plants as its role in the central metal of chlorophyll, the site of photosynthesis. Magnesium was identified by Joseph Black in 1755 who identified it as an element but it was not until 1808 when Sir Humphrey Davy used electrolysis to separate Magnesium metal from Magnesium oxide. It is located in Group 2 as a metallic solid at room temperature it is relatively light weight and strong. It has a melting point of 650°c and a boiling point of 1091°c.
Sir Humphrey Davy