Chapter 12 The alkali and alkaline earth meta X 12.1 The elementary substances 12.2 The properties of the alkali and alkaline earth compounds X$12.3 The particularity of Li and Be The diagonal relationship
§12.3 The particularity of Li and Be The diagonal relationship §12.2 The properties of the alkali and alkaline earth compounds §12.1 The elementary substances Chapter 12 The alkali and alkaline earth metal
12.1 The elementary substances 12.1.1 Properties of the elementary substances 1.Physical properties ☆Metallic luster; ☆Low densities;. ☆Soft; ☆Low melting point;: *Good conductor of heat and electricity Na Li K
§12.1.1 Properties of the elementary substances Na Li K 1.Physical properties §12.1 The elementary substances ☆Metallic luster; ☆Low densities; ☆Soft; ☆Low melting point; ☆Good conductor of heat and electricity
Rb 181 Low melting point Be Mg Ca 98 6 29 Sr Ba Li Na K Rb Cs Fr
Be Mg Ca Sr Ba Rb Cs Low melting point Li Na K Rb Cs Fr
2.Chemical properties: React with oxygen,sulfur,nitrogen and halogen to form their corresponding compounds. The elementary substances form the corresponding oxides when they burn in air: Li2O 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 their corresponding compounds. 2.Chemical properties: Magnesium burning in air Li2O Na2O2 KO2 Pale yellow Pale yellow
.React with water 2M+2H,O->2MOH+H2(g) Li Na K Bromothymol blue indicator 溴百里酚兰指示剂 Ca
•React with water Li Na K Ca 2M + 2H2O → 2MOH + H2 (g) Bromothymol blue indicator 溴百里酚兰 指示剂