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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Amber Crisp 3/5/14 3/5/14 Flame Test Purpose In this experiment I will learn how to perform and observe the flame tests of some alkali and alkaline earth metals and be able to identify and unknown chemical by the color of the flame Procedure I placed about 0.5 mL of 8 different chemicals into 8 different places in the 24-well plate. I then lit the handy wick to keep a flame burning. I soaked a cotton swab in the first chemical and moved the cotton swab in and out of the flame rapidly to see the flame
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Electron Configurations and the Periodic Table Practice Problems History of the Atom CW: 1. Why is it not possible for an electron to continue in a set orbit around the nucleus like a planet around the sun? HW: 2. Explain how emission spectra of gasses helped scientists to determine electrons traveled in energy levels. Energy Level Diagram CW: 3. Draw the energy level diagram for Iron. 4. Draw the energy level diagram for Sulfur. 5. Draw the energy level diagram for Argon 6. Draw the
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paramagnetic:V+4 or 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
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Part 1 Part 1 of the experiment investigated the effect of different temperatures on beetroot cell membranes (a type of plant cell). Through this experiment‚ the process of diffusion and osmosis was in action. Various temperatures ranging from low temperatures to high temperatures such as -5⁰C‚ 5⁰C‚ 30⁰C‚ 50⁰C and 80⁰C were used to investigate the temperature effects on beetroot cell membranes. The hypothesis predicted that the higher the temperature the darker the beetroot substance and the lower
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The purpose of this report is to first discuss the reasons why Duracell’s performance has been decreasing over the past four years‚ and then recommend some strategic actions Gillette should take to turn Duracell around. This report will begin by providing a brief introduction on the acquisition of Duracell by Gillette‚ followed by the reasons it lacked success‚ and finally end with the proposed recommendations for Duracell. Currently‚ Gillette’s operating segments include personal grooming‚ small
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The indicator will change colour depending on whether an acid or an alkali is added. The colour in red cabbage (it is a pigment called an anthocyanin) makes a very good indicator. Acids and alkalis Acids have a sour taste‚ like vinegar (which contains ethanoic acid) and lemons (which contain citric acid). Alkalis are substances that react with acids and neutralise them. Soap and washing powder are alkaline. Acids and alkalis are found in a surprising number of places. Some are edible and are found
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MgO(s) + 2HCl(aq) ==> MgCl2(aq) + H2O(l) MgO(s) + H2SO4(aq) ==> MgSO4(aq) + H2O(l) MgO(s) + 2HNO3(aq) ==> Mg(NO3)2(aq) + H2O(l) In all cases the ionic equation is: MgO(s) + 2H+(aq) ==> Mg2+(aq) + H2O(l) Reaction of oxide with strong bases/alkalis: No reaction. Reaction of element with chlorine: Forms colourless solid ionic magnesium chloride‚ Mg2+(Cl-)2‚ when heated in chlorine. Mg(s) + Cl2(g) ==> MgCl2(s) Reaction of chloride with water: The salt dissolves in water forming a nearly
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procedures Micro-emulsion of an organo-modified polysiloxane Colourless to faintly yellow‚ clear to opal Cationic 4.0 – 6.0 Approx. 1.0 TUBINGAL RGH is stable to hard water and acids in the usual industrial concentrations. TUBINGAL RGH is stable to alkali (tested up to pH 11). When mixing several products‚ we propose checking its compatibility in pretrials. The product is not sensitive to frost. TUBINGAL RGH is sensitive to temperatures higher than 60 °C. Storability TUBINGAL RGH can be stored
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exceeded in aluminum and iron.Magnesium readily ignites upon heating in air and burns with a dazzling white flame. To extinguish the flame water should not be used. Alkaline earth metal salts in general‚ are less soluble in water than the corresponding alkali metal salts. Some are even so insoluble that they resist weathering and leahcing action in rainwater. Its common oxidation states is 2. Magnesium forms many compounds. The oxide‚ hydroxide‚ chloride‚ carbonate‚ and sulfate are commercially important
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