Metals and Non-metals Elements are divided mainly into two groups on the basis of physical and chemical properties – Metal and Non-metal. Metals: Part - I Physical Properties of Metals:- Hardness:- Most of the metals are hard‚ except alkali metals‚ such as sodium‚ potassium‚ lithium‚ etc. Sodium‚ potassium‚ lithium etc. are very soft metals‚ these can be cut using knife. Strength:- Most of the metals are strong and have high tensile strength. Because of this big structures are made using metals
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Lightning Bolt One day Zeus went to go see Posiedon. So they can make a deal so they dont have to fight. Because a long time ago they got into a fight about something stupid because Posiedon said he was better than Zeus. So they decided to make a lightning bolt. The lightning bolt was big‚ loud‚ lighting strikes every time it would flash. And the strikes were bright. It was as bright as a light bulb. So that day they got all their materials around. The next day they made the lightning bolt. Zeuas
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Is displacement a likely outcome of any situational crime prevention initiative? The short answer to this question is no. I will illustrate this answer in more detail by drawing upon three required readings. In his paper‚ Eck (1993‚ pp. 527) explicitly indicated that “there is no evidence of greater than 100% displacement and that full displacement is unlikely.” By summarizing pioneers’ works on the displacement‚ Eck listed six types of displacement: temporal‚ spatial‚ target‚ method‚ crime type
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life long tenants‚ and the alterations of whole neighborhoods. On paper‚ it seems like it’s a great idea to take a neighborhood and give it a face lift‚ but there is a human element to the equation we are leaving out. Sternbergh (2009) notes that “Displacement
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Chemistry - Module 2 - Metal 1. Metals have been extracted and used for many thousands of years * Outline and examine some uses of different metals through history‚ including contemporary uses‚ as uncombined metals or as alloys. Contemporary Uses of common metals Metal | Uses | Iron and Steel (an alloy with <2% carbon)Good tensile strength‚ cheap‚ rusts (corrodes) | - Railways‚ bridges‚ buildings- motor cars bodies‚ ships and trains- Engine blocks‚ fire hydrants‚ drainage
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Density Lab Partners: Betty Alcaraz Date: 9/10/13 Teacher: Wright Class: 7th period Introduction/Purpose: To determine the densities of unknown substances. Pre-Lab: 1. Which is heavier‚ a pound of feathers or a pound of lead? a. A pound of lead. 2. What is the density of a mineral if 427 g of the mineral occupy a volume of 35.0cm3? b. 12.2g/cm3 3. The water level in a graduated cylinder stands at 20.0 mL before and at 26.2 mL after a 16.74 g metal sample
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Ashley Robins 9/13/11 Honors Chemistry Period 4 Density Lab Purpose: 1. To determine the density of a solid using different laboratory techniques for measuring volume. 2. To use the intensive property of density to identify an unknown substance. Procedure: 1. Obtain a bag marked with a number containing a cube and a cylinder from the teacher. Record the number on the bag in the data table. Density of a cube: Using a balance‚ record the mass of the cube to the nearest tenth of a gram
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10/1/13 Cubs Density The purpose of this experiment is to find out the density of the unknown solid object by determining the mass and the volume through the experiment. To do this we will be get the mass of the object and determine the volume of the object by placing it into a liquid. Then we will divide mass by volume and get its density. Materials 3 buckets filled with water Water A bucket to measure volume A stool Measuring scale to measure weight Notebook Procedure 1. Find
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Tribal Displacement and Human Rights Violation Introduction After the Independence‚ India was engaged in a nation-building process. Nation building was equated with modernization and fast development of infrastructure and economic conditions of the people and the country as a whole. The question is that the development activities should give space for the protection of the rights of the Tribal people and the prosperity or greater good for the larger numbers? The pursuit of development has in present
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The Displacement Reactions Purpose: to see how displacement reaction works with different chemicals and what chemical has more reactivity series then other Hypothesis: Iron + Copper Sulfate: Iron will displace copper because it is more reactive and it is going to end up as Iron Sulphide + Copper Copper + Silver Nitrate: Copper will displace Silver because it is more reactive and it is going to end up as Copper Nitride + Magnesium + Copper oxide: Magnesium will displace Copper because it
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