Class 1 Metallic bonding: Found in metals and alloys‚ 1‚ 2‚ or 3 valence electrons that are not bound to any particular atom in the solid. They drift throughout the entire metal. This results in a sea of electrons. These free electrons result in good electrical and heat conductivity. Coordination number is 8 or 12 (number of nearest neighbors). Ionic Bonding Found in compounds that are composed of both metallic and nonmetallic elements. Metallic element gives up valence electrons to the
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My Birthstone: Aquamarine There are twelve months in the calendar and for each there is a birthstone. A birthstone is a gemstone that symbolizes a person’s month of birth. Today‚ many believe that there could be a connection between the twelve stones and the twelve signs of the zodiac. What is really interesting is the fact that this believe goes back in time to the first century. According to GemologyOnline.com‚ the connection between the stones and the zodiac signs go back in time to
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The Presence of Uranium in Excess in Bathinda Waters can be one of the Reasons of High Cancer Deaths in the District (Prof. Surinder Singh)* Bathinda district‚ an important cotton growing belt of the state is in light since the last few years due to the higher mortality rate in the area. Giana‚ Malkana and Jajjal villages of Talwandi Sabo‚ Bathinda district are the worst effected areas. Various Government and Non Government agencies such as
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(a)Ferromagnetic materials: Ferromagnetic materials have a large‚ positive susceptibility to an external magnetic field. They exhibit a strong attraction to magnetic fields and are able to retain their magnetic properties after the external field has been removed. Ferromagnetic materials have some unpaired electrons so their atoms have a net magnetic moment. They get their strong magnetic properties due to the presence of magnetic domains. In these domains‚ large numbers of atom’s moments (1012
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YNGAR_MAR06- grade 2 Title: What you Need to Know About Garcinia Cambogia? Meta Description: In these days‚ people around the world have become conscious about their health. Weight Loss has become a huge inclination among individuals all over the world. Very often whenever the topic of Weight Loss arises‚ some products like Aci berry‚ Green tea and the like’s rouses huge demand. Of late researchers and various studies have added a product‚ which is known to many as Tamarind! Garcinia Cambogia extract
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Engineering Materials Msc. Shaymaa Mahmood Introduction to Eng. Materials : Since the earliest days of the evolution of mankind ‚ the main distinguishing features between human begins and other mammals has been the ability to use and develop materials to satisfy our human requirements. Nowadays we use many types of materials‚ fashioned in many different ways‚ to satisfy our requirements for housing‚ heating‚ furniture‚ clothes‚ transportation‚ entertainment‚ medical care‚ defense and all the
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Superfund Program Peggy Toler E.Hansen/EVS1001-31 March 31‚ 2011 Peggy Toler 2 Superfund Program I did not know what a Superfund program was until I looked it up and then I found out that it is an act that is the cornerstone legislation that provides the mechanism and funding for the cleanup of potentially dangerous hazardous-waste sites and the protection of ground water and human health. When you live near a superfund site‚ you and your family are at risk of developing a disease
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like the smell of smog or the almost-not-smell of tulips in the spring‚ nature tidily plotted in little squares with a fountain in the centre; museum smell‚ art also tidily plotted with a guidebook; or the smell of work‚ glue factories maybe‚ chromium-plated offices; smell of subways crowded at rush hours. Where I come from‚ people carry woods in their minds‚ acres of pine woods; blueberry patches in the burned-out bush; wooden farmhouses‚ old‚ in need of paint‚ with yards where hens and
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"Should Parents Vaccinate Their Kids?" "The number of reports of influenza-vaccine–associated Guillain– Barré syndrome to the national Vaccine Adverse Event Reporting System increased from 37 in 1992–1993 to 74 in 1993–1994‚ arousing concern about a possible increase in vaccine-associated risk" ("The Guillain" par. 1). Vaccinations have been around for many years and are supposed to help children. So‚ what if statistics showed you they didn’t‚ would you rethink your decision? Most people believe
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for medicinal purposes. Eat it raw‚ cooked or steamed‚ the vegetable offers a treasure trove of nutrients‚ besides an awesome taste. Often regarded as a super-food‚ broccoli is packed with Vitamins A and C‚ iron‚ calcium‚ protein‚ carbohydrates and chromium. Read on to unlock the tremendous nutritious values that broccoli can provide you with. Combating arthritis A broccoli compound‚ known as sulphoraphane‚ is rich in sulphur. It helps to block an enzyme‚ that harms the skeletal system by damaging
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