Magnesium is a solid at standard conditions of temperature and pressure. At 1,202 degrees Fahrenheit, magnesium melts and becomes a liquid, while at 1,994 degrees Fahrenheit, it evaporates and becomes a gas.
Magnesium is classified as an alkaline earth metal and appears gray and white in color, although it can tarnish when exposed to air. In nature, magnesium is only found as part of a compound combined with other elements. It is the fourth most common element found in the earth, commonly found dissolved in seawater and in the planet's crust. Magnesium is highly flammable and burns with a white flame.