Data Zone | Discovery | Facts | Appearance & Characteristics | Uses | Abundance & Isotopes | References 12 Mg 24.30 The chemical element magnesium is classed as an alkali earth metal. It was discovered in 1808 by Humphrey Davy. Data Zone Classification: Magnesium is an alkali earth metal Color: silvery-white Atomic weight: 24.305 State: … Continue reading Magnesium Element Facts