Alkali Metals Introduction Alkali metals refer to six elements belonging to the Group IA of the long form of the Modern Periodic Table‚ viz. Lithium (Li)‚ Sodium (Na)‚ Potassium (K)‚ Rubidium (Rb)‚ Cesium (Cs) and Francium (Fr). Fr is a radioactive element. These elements are called so because they form strongly alkaline oxides and hydroxides. Electronic Configuration of Alkali Metals Each of the alkali metals has one electron in their outermost (valence) shell‚ which is just outside an inert
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Metals and Halogens reactions Elements such as fluorine‚ chlorine‚ bromine‚ iodine‚ and astatine belong to Group 7‚ Halogens. At room temperature‚ fluorine is a yellow gas‚ chlorine is a pale green gas‚ bromine is a red liquid‚ and iodine is a purple solid. Astatine is a radioactive element‚ therefore it exists only in small amounts. All the halogens exist in diatomic molecules. They have high ionization energies and are the most electronegative elements. Their electron configuration ns2 np5 make
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The alkali metals are found in group 1 of the Periodic table. They are very reactive metals and do not occur freely in nature. Alkali metals are malleable‚ ductile‚ and are good conductors of heat and electricity. Alkali metals can also explode if they are exposed to water. The Alkali metals are: lithium‚ sodium‚ potassium‚ rubidium‚ cesium‚ and francium. Lithium The mineral petalite‚ which contains lithium‚ was discovered by a Brazilian scientist named Jose Bonifacio towards the end of the
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* The halogens can be found on the left-hand side of the noble gases. * These five toxic‚ non-metallic elements make up Group 17 of the periodic table and consist of: fluorine (F)‚ chlorine (Cl)‚ bromine (Br)‚ iodine (I)‚ and astatine (At). * Although astatine is radioactive and only has short-lived isotopes‚ it behaves similar to iodine and is often included in the halogen group. * Since the halogen elements have seven valence electrons‚ they only require one additional electron to form
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rates of reaction of Alkali metals and Alkaline Earth meatals are compared in this lab. The pH of each of the resulting metal solutions are tested and the products of the reaction between calcium and water is discovered. The tested elements are sodium‚ lithium‚ potassium and calcium and each of them were placed in a beaker filled with water. The resulting solutions pH levels were tested with litmus paper. There were more steps for caclium because it is the only Alkaline Earth metal. For calcium‚ the
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Sierra Silva‚ Renata Beyer Perch Chemistry 171 20 October 2014 Periodicity of the Halogens Goal: To design and carry out an experiment that will give enough data to rank the three halogens from highest to lowest electron affinity. Background: The three aqueous solutions given in this experiment are Iodine‚ Bromine‚ and Chlorine; they are all non-polar and dissolve easily in Hexane which is also non-polar. When there is a color change in a mixture that means that it reacted and that there was a double
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Maggie Mitchell IB Chemistry Prd. 5 THE HALOGENS LAB Date: 9/11/13 Purpose: The purpose of this experiment was to observe and record the halogens’ (NaF‚ NaCl‚ NaBr‚ and KI) reactions with the chemicals Ca(NO3)2‚ AgNO3‚ and NH4OH and use these observations to identify an unknown halogen. Data: (see next page) TABLE 1: REACTIONS OF HALOGENS WITH CA(NO3)2‚ AGNO3‚ AND NH4OH REACTION NAF NACL NABR KI REACTION W/ CA(NO3)2 solution turns cloudy and precipitate forms clear precipitate
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Oxidation & Reduction I. Metal-Metal Ion Displacement II. Halogen Displacement Reactions INTRODUCTION A series of experiments had been conducted to determine the order of displacement strengths of the metals and halogen chosen for the experiments. A displacement reaction is a reaction in which one element(metal or non-metal) displaces another element(metal or non-metal) from its salt solution. In the displacement reaction of metals‚ the more electropositive metal will displace the less
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1. What are some benefits of using halogen light bulbs in lighting fixtures for filming? – The benefits of using the halogen lights could be that they can last longer and are much brighter than regular light bulbs. 2. Describe in detail how to create the effect of light coming through a window onstage in a theatrical production. – A metal cutout will create an effect of a light shining through a window‚ so that it doesn’t look like a straight up spotlight on stage. 3. What is hard light? How does
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child usually develops reactive attachment disorder before the age of five years and it may be evident during the first months of infancy. Such children show maladaptive behaviors frequently and avoid interacting with others. The children diagnosed with reactive attachment disorder possess characteristics such as rudeness with humans and animals‚ and intentional lying where the child is aware of the fact that the other individual knows the truth. The Implications of Reactive Attachment Disorder Through
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