2.Chemical properties: ·React with oxygen、sulfur、nitrogen and halogen to form the corresponding compounds. The elementary substances form the corresponding oxides when they burn in air: Li,O Na202 KO2 RbO2 CsO2 BeO MgO CaO SrO BaO2 Na,O, Pale yellow Pale yellow Magnesium burning in air The elementary substances form the corresponding oxides when they burn in air: Li2O Na2O2 KO2 RbO2 CsO2 BeO MgO CaO SrO BaO2 • React with oxygen、sulfur、nitrogen and halogen to form the corresponding compounds. 2.Chemical properties: Magnesium burning in air Li2O Na2O2 KO2 Pale yellow Pale yellow