Magnesium is a light, silvery-white, and fairly tough metal. It tarnishes slightly in air, and finely divided magnesium readily ignites upon heating in air and burns with a dazzling white flame.
Melting point: 650 °C Boiling point: 1090 °C
A foil is a thin sheet of pure metal. Given its fragile nature, some foils have protective coatings.