Magnesium

Magnesium is a metallic element that belongs to alkaline earth metal group. It is a silvery-white metal and is fairly hard. Uses of magnesium include photography, fireworks, among others. It is also an essential nutrient in humans. Some magnesium compounds, such as magnesia, are used for its medical properties. Elemental magnesium was first isolated by Sir Humphrey Davy, a British chemist.