Unit 1: Introduction to Biochemistry Lesson 1-4: Key Question How many electrons does Mg2+ have? (1 mark) Mg2+ has 10 electrons. A magnesium atom has 12 electrons with 2 of the 12 being valence electrons. Therefore the atom will lose the valence electrons which are located on the outermost shell to stabilize itself (outermost shell) as atoms tend to do what it easiest. Since magnesium lost 2 electrons it becomes positive as it is giving away electrons to stabilize other atoms. Hence magnesium
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process whereby the soaps are prepared by hydrolyzing fats or oils under alkaline conditions. It is also the alkaline hydrolysis of esters using alkaline solutions. Fats/ Vegetable oils + concentrated alkalis – soap + glycerol (Fats- tallow from cow) ( Vegetable oils – palm oil or olive oil) For example‚ - Glyceryl tristearates ❑ is a naturally occuring esters ❑ found in fats or oils. Example of soap‚ 1) sodium palmitate‚ C H COONa
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Produktinformation Seite 1 von 1 -k is h. PVC Handbook co m Pars Ethylene Kish Co. et hy le ne Charles E. Wilkes‚ Charles A. Daniels‚ James W. Summers Leseprobe 2 ar as ISBN 3-446-22714-8 w w w .p Weitere Informationen oder Bestellungen unter http://www.hanser.de/3-446-22714-8 sowie im Buchhandel www.parsethylene-kish.com (+98 - 21) 88 20 20 60 http://www.hanser.de/deckblatt/deckblatt1.asp?isbn=3-446-22714-8&style=Vorwort 18.08.2005 Pars Ethylene Kish Co. Flexible PVC -k
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Chemistry GENERAL CHEMISTRY: Atomic Structure and elementary quantum mechanics: Blackbody radiation‚ Planck’s radiation law‚ photoelectric effect‚ Compton Effect‚ de Broglie’s hypothesis‚ Heisenberg’s uncertainty principle. Postulates of quantum mechanics‚ Schrodinger wave equation and a particle in a box‚ energy levels‚ wave functions and probability densities‚ Schrodinger wave equation for H-atom‚ Separation of variables‚ Radial and angular functions‚ hydrogen like wave functions‚ quantum numbers
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the world’s highest fertility rates are therefore likely to enter in this trap as predicted by Thomas Malthus and risk to fall deeper into poverty and pauperisation due to the finiteness of natural resources. On the other hand it can be argued‚ like Ester Boserup did in her notable book The Conditions of Agricultural Growth (1965)‚ that population growth leads to innovation in agricultural techniques due to an increasing talent pool and therefore to economic growth. Apart from Boserup’s different view
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by : Directorate of Education‚ Delhi SOME IMPORTANT REASONING BASED QUESTIONS OF ORGANIC CHEMISTRY 1. Chlorobenzene is less reactive than chloromethane. Ans. In chlorobenzene‚ each carbon atom of benzenering is sp2 hyridised and is electron withdrawing. Chlorine atom donates a lone pair of electron and acquire positive charge. The negative charge is delocalised on ortho and para position by resonance. C-Cl bond acquires partial double bond character and is 169 pm as compared to 17.0 pm in chloromethane
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Lesson 08.01: Half-life and Radioactive Decay · Distinguish between nuclear and chemical reactions. · Compare and contrast different types of nuclear decay and the properties of the three types of radiation (alpha‚ beta‚ and gamma) discussed in the lesson. · Be able to predict the isotope or radiation produced by a nuclear decay reaction when the other product is given. · Describe and make predictions regarding half-life‚ including using a graph or set of data to determine the half-life of
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Biodiesel: Technology & Business Opportunities – An Insight S Biswas‚ N Kaushik & G Srikanth Technology Information‚ Forecasting and Assessment Council (TIFAC) Department of Science & Technology‚ New Delhi – 110 016 Tel: +91-11 -2686 3816‚ Fax: 2696 1158‚ e-mail : biswas@nic.in The concept of bio fuel dates back to 1885 when Dr. Rudolf Diesel built the first diesel engine with the full intention of running it on vegetative source. In 1912 he observed‚ " … the use of vegetable oils for engine fuels
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HOMOLOGOUS SERIES | ALKANE | ALKENE | ALCOHOL | CARBOXYLIC ACID | ESTER | GENERAL FORMULA | CnH2n+2‚ where n= 1‚2‚3‚.. | CnH2n‚ where n= 2‚3‚4‚.. | CnH2n+1OH‚ where n= 1‚2‚3 | CnH2n+1COOH‚ where n= -0‚1‚2‚3‚.. | CnH2n+1COOCmH2m+1‚ where n= 0‚1‚2‚3‚.. and m= 1‚2‚3‚.. | PHYSICAL PROPERTIES | * MP & BP Size of hydrocarbon molecules inc‚ f.o.a inc‚ more heat overcome f.o.a * Density Mass per molecule inc faster than volume per molecule * Gas – liquidSize of hydrocarbon molecule inc‚ f
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Unit 1 Lesson 1 Key Question Biology SBI4U-C ILC 1) Mg2+ Has 10 electrons. 2) Carbon -14 would not be effective at dating bones that are millions of years old. Carbon -14 is effective at dating to a maximum of 40 000 to 50 000 years old. The isotope decays over time and would not be present on bones that are millions of years old. 3) Hydrolysis - Water used to breakdown molecules. Hydro means water and lysis means to breakdown. An example of hydrolysis in action within our bodies is how our
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