an irritant. Group 2 elements Calcium Strontium Magnesium Beryllium Barium Radium Introduction: The Group 2 elements are all metals with a shiny‚ silvery-white colour having 2 electrons in their outermost shell. The alkaline earth metals are high in the reactivity series of metals‚ but not as high as the alkali metals of Group 1. The metals of Group 2 are harder and denser than sodium and potassium‚ and have higher melting points. These properties are due largely to the presence of
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Android Application Development for GPS Based Location Tracker & Attendance Management System Asit Kumar Parida National Institute of Technology‚ Rourkela Odisha‚ India - 769008 NITR Android Application Development for GPS Based Location Tracker & NITR Attendance Management System ------------------------------------------------------------------------------------------------------------------- Thesis submitted in May‚ 2013 in partial fulfilment of the requirements for the degree of Bachelor
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documentation of equipment expenditures and holdings in the Afghanistan war and corruption in Kenya.[12] In April 2010‚ WikiLeaks published gunsight footage from the 12 July 2007 Baghdad airstrike in which Iraqi journalists were among those killed by an AH-64 Apache helicopter‚ known as the Collateral Murder video. In July of the same year‚ WikiLeaks released Afghan War Diary‚ a compilation of more than 76‚900 documents about the War in Afghanistan not previously available to the public.[13] In October 2010‚
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V+5 and why? (1) 5 How cathode rays are originated in the discharge tube and how their origin differs from the origin of anode rays? 6 When is a cation highly polarizing? Which alkali metal has the highest polarizing power? (1) 7.Why is KO2 paramagnetic? (1) 8 Potassium and Caesium are used in photoelectric cells
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Chemistry And Environment‚ Vol. 7 (4) Dec. (2003) Res. J. Chem. Environ. Review Paper: Biosorption of Heavy Metals N. Ahalya‚ T.V. Ramachandra*l and RD. Kanamadi2 1. Centre for Ecological Sciences‚ Indian Institute of Science‚ Bangalore 560 012‚ INDIA. 2. Department of Zoology‚ Karnataka University‚ Dharwad‚ INDIA. Abstract: The discharge of heavy metals into aquatic ecosystems has become a matter of concern in India over the last few decades. These pollutants are introduced
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Observations Element Observations Metal or Non-Metal Sodium -Lustrous -Forms oxides on surface rapidly -A soft metal -silvery-white colour Metal Magnesium -Lustrous -Forms oxides on surface -Silvery-white colour -Malleable but less than alkali metals Metal Aluminium -Silvery-white metal -Malleable but less than alkali earth metals -Forms oxide on surface Metal by observation‚ metalloid by properties Sulphur -Soft pale-yellow powder -It is odourless Non-metal Reactions with water:
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other alkali metals. Because these elements are very similar chemically‚ their separation presented numerous problems before the advent of ion-exchange methods and ion-specific complexing agents such as crown ethers. Once pure salts have been prepared‚ it is a straightforward task to convert them to the free metal. This can be done by electrolysis of the fused cyanide or by reduction with calcium or sodium followed by fractional distillation. Properties Rubidium is an alkali metal in group IA of
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Clifton Metal Works Study Class Clifton Metal Works Study Class 1.- Coment on the current mission statement. Does it provide the strategic direction nesecary for success for this company? First it is necessary to know what elements are necessary to develop a mission and what are the goals of the mission statement for a company. The mission statement of a company defines its reason for existence‚ it should answer the question: "Why
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present age there is a rapid increase of contaminants in the environment‚ but one of the major global concerns is the heavy metal concentrations in the environment as a result of man’s activities and since the biosphere is a closed system this heavy metals remains on earth and continuously increase as the human population increase. The acute and chronic effects of these heavy metals especially lead have been a worldwide concern. In fact in April 2000 the use of leaded gasoline was phased out in Metro
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Thermal Conductivity of Metals and Non-metals 1. Introduction Thermal conductivity is a physical property of materials of great importance. Unlike some physical properties‚ however‚ thermal conductivity cannot be directly measured. In order to determine a material’s thermal conductivity‚ intermediate quantities must be determined from which the conductivity may be ultimately calculated. The objective of this lab was to determine the thermal conductivity of metals. To do so‚ it was necessary to study
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