Alkaline earth metals

Alkaline earth metals (cont.)

Common Properties All In the second row Don’t occur as free elements Most commonly are found occurring as the carbonates, phosphates silicates, and sulfates Atoms loose 2 electrons Most are insoluble or slightly soluble Very Reactive

Natural Occurrences Found in earth’s crust Rock Structures Magnesium is found in Carmelite, magnetite and dolomite. Extracted from sea water Calcium is found in found in chalk, limestone, gypsum and anhydrite

Chemical properties All but Beryllium form oxides at room temperature Magnesium reduces carbon dioxide Strontium, Calcium, barium when put in water react to form hydroxides

Flame test –Mg: White –Ca: Dark red –Sr: Crimson –Ba: light green

Beryllium- Uses SpacecraftAircraftMissilesX-rays

Magnesium- Uses AirplanesMissilesFlaresBombs Car Engines MedicineComputers

Calcium- Uses Builds Strong bones and teeth Used in Milk Used to make plaster

Uses Strontium Flares Uses to create Crimson Color

Uses- Barium Medical Applications Glass making Rat poison Making Rubber

Uses- Radium To treat Cancer