Alkaline Earth Metals

Alkaline Earth Metal Elements

Elements Continued

Similar Properties All In the second row Don’t occur as free elements Most commonly are found occurring as the carbonates, phosphates silicates, and sulfates Flame test can be used to determine if the element is an Alkaline Metal Atoms loose 2 electrons Most are insoluble or slightly soluble Very Reactive

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

Physical Properties Have higher melting points, are harder and are more dense than Potassium and Sodium When put in flame: Mg:White Ca:Dark red Sr: Crimson Ba: light green 2 valence electrons Metallic and Ductile Shiny silvery white Malleable

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

Uses- Strontium Fireworks Flares To create a crimson Color

Uses- Radium Treating Cancer

Uses- Barium Medical Applications Glass making Rat poison Making Rubber

Magnesium- Uses Airplanes Missiles Flares Bombs Car Engines Medicine Computers

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

Beryllium- Uses Spacecraft Aircraft Missiles X-rays

Quiz 1.) Choose Two characteristics of Alkaline Earth Metals: A. Have a silvery luster C. Glow yellow in the dark B. Are Ductile D. Are not Malleable 2.) Two of the six metals in this group are: Magnesium C. Gold Argon D. Radium

Quiz Continued 3.) A flare is made out of what element in this group? Magnesium C. Radium Calcium D. Beryllium 4.) What can you make from Alkaline Earth Metals? Paper C. Fireworks Mold D. Plastic

Last Question! 5.)What test can be used to identify three of the six alkaline earth metals? Gold foil test C. Density test Flame test D. Boiling test