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Alkaline Earth Metals

Alkaline Earth Metals. By Hannah Morris, Laura Way, and Christine Coy. Information. Group name: Alkaline Earth metals Group number: 2 Element symbols: Be (Beryllium) Mg (Magnesium) Ca (Calcium) Sr (Strontium) Ba (Barium) Ra (Radium) Electron Configuration: ns 2

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Alkaline Earth Metals

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  1. Alkaline Earth Metals By Hannah Morris, Laura Way, and Christine Coy

  2. Information • Group name: Alkaline Earth metals • Group number: 2 • Element symbols: • Be (Beryllium) • Mg (Magnesium) • Ca (Calcium) • Sr (Strontium) • Ba (Barium) • Ra (Radium) • Electron Configuration: ns2 • State of matter: Solid • Element classification: metal • Special group name: Alkaline Earth Metals

  3. Beryllium • Physical Properties: • Steel gray, light-weight, brittle • Melting point: 1287⁰C • Good conductor of electricity and heat • Not radioactive, but very toxic • General Chemical Properties: • Unexpectedly inert • Not reactive with air, water or even heat • Not found free in nature  compound found in rocks and soil • Beryllium foil is used in x-rays and integrated circuits • It is found in gemstones like aquamarine and emerald

  4. Magnesium • Physical Properties: • Grayish-white and fairly tough • Melting point: 650⁰C • Good conductor of electricity and heat • Not radioactive naturally • General Chemical Properties: • Highly reactive • Hot water, oxygen, acids, and alkali metals • Not found free in nature  naturally occurring isotopes are Mg-24, Mg-25, Mg-26 • 25 grams in the average body, half of which are found in the bones • Used in pyrotechnics, bombs, and flares

  5. Calcium • Physical Properties: • Silvery-white and soft • Melting point: 842⁰C • Good conductor of electricity and heat • Not radioactive • General Chemical Properties: • Very reactive • Reactive to water • Not found free in nature  compounds are some of the most common on earth • Used for maintaining healthy bones and teeth • One of the most common elements in the earths crust

  6. Strontium • Physical Properties: • Silvery-yellow metallic and soft • Melting Point: 777°C • Good conductor of heat and electricity • Isotope Sr-90 is radioactive • General Chemical Properties: • Extremely reactive • Air and water • Not found free in nature • Sr-90 is used in cancer therapy and is essential to superficial radiotherapy • Used in producing glass for colored televisions

  7. Barium • Physical Properties: • Silvery white and soft • Melting point: 725°C • Good conductor of heat and electricity • Has dozens of radioactive isotopes • General Chemical Properties: • Very reactive • Water and all non-metals • Not found free in nature • Abundant in the earths crust, nuts, soils, seaweed, fish, and some plants • Barium is used in glassmaking, medicine, and electronics • Barium is used to give fireworks it’s greenish color

  8. Radium • Physical Properties: • Pure white and soft • Melting Point: 700°C • Good conductor of heat and energy • Radioactive • General Chemical Properties: • Most reactive in the family • Reacts violently to air and water • Not found free in nature  can be found in different earth levels, rocks, and soil • Used in luminous paint, medicine and cancer treatment • Used in clock hands until factory workers began to die from it

  9. Magnesium in Water http://www.youtube.com/watch?v=P_KFGCS2JSo&feature=related

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