Robert Bunsen was born on March 31‚ 1811 in Gottingen‚ Germany. He was the youngest of four sons. Robert started schooling in the city of Holzminden‚ and then studied chemistry at Gottingen. Bunsen was awarded his doctorate in 1830 for a dissertation on different kinds of hygrometer. He was only 19 at this point in his life. Following being awarded his doctorate‚ he immediately set off on extensive travels that took him through Germany and Paris and eventually to Vienna from 1830 to 1833. All of
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UNIT 1 – What is Biology? What is biology? the study of living organisms‚ divided into many specialized fields that cover their morphology‚ physiology‚ anatomy‚ behavior‚ origin‚ and distribution. Biotic vs. abiotic factors Biotic- living factors i.e. plants‚ animals‚ fungi‚ bacteria‚ and protest Abiotic- nonliving factors that affect living organisms. Environmental factors: habitat & weather 7 Characteristics of living things (Bio 3 Book Ch. 1) Uni-cellular vs. Multi-cellular Uni-Cellular-
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Sedimentary rocks in Pakistan range in age from Precambrian to Miocene i.e from oldest to youngest on the geological time scale form 542 million years to latest. Luckily for geoscientists all of them are exposed in different parts of the country. Lithologically they constitute sandstone‚ limestone‚ shale and mixed lithologies of them all. These rocks are exposed all along the mountain ranges from Islamabad in north to Karachi in the south. Igneous rocks are exposed north of Peshawar or only at
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the making of spaceships. As far as bonding goes‚ metals easily lose their outer shell electrons‚ or valence electrons. This property is what gives them their ability to easily conduct heat and electricity.There are sub-groups of metals called the alkali metals‚ alkaline earth metals‚ and transition metalsNon-metals: Bad conductor of heat and electricity (exception: Graphite‚ a form of carbon). Don’t have shining luster (Exception: Iodine). Dull appearance. May be solids‚ liquids‚ or gas at
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elements in the same horizontal row. Seventy five percent of the table is made up of metals‚ and a couple of the columns on the right of the table have gases. There are only two elements that are liquids- mercury and bromine. Column 1 contains the alkali metals‚ which suddenly combust when exposed to air or water. Columns 3-12 are the transition metals‚ which contain heavier atoms‚ which are more flexible in how they organize their electrons. Column 17 is made up of the more reactive gases- the halogens
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11_5070_11/2RP © UCLES 2011 [Turn over 2 1 In a titration between an acid (in the burette) and an alkali‚ you may need to re-use the same titration flask. Which is the best procedure for rinsing the flask? A B C D 2 Rinse with distilled water and then with the alkali. Rinse with tap water and then with distilled water. Rinse with tap water and then with the acid. Rinse with the alkali. The labels fell off two bottles each containing a colourless solution‚ one of which was sodium carbonate
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Case Study: Ordinary Portland Cement INTRODUCTION • Cement – Is a material with adhesive and cohesive properties which is capable of bonding mineral fragments into a compact-solid whole • Ordinary Portland Cement (OPC) – Is a hydraulic cement. It is used in the making of concrete with property of setting and hardening‚ of which when the chemical properties reacts with water. OPC Does not disintegrate in water as it sets and hardens in water • Reason of widely usage in Malaysia – Is because
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ical Chemistry 1.which of the following pairs of compound will react? iC3H6+Br2 iiC3H6+Cl2 in sunlight iiiC3H6+H2O in the presence of sulphuric acid ivC3H6+H2O in the presence of concentrated sulphuric acid a.i b.i‚iii c.i‚ii‚iii d.all 2.liqiud y reacts with magnesium metal to produce a gas that burns with a pop sound when a flaming wooden splint is placed near it.liqiud y is most likely a compound that has the formula a.c2h5oh b.hcooh c.h3cooch3 d.c6h14 3.a compound p has the
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IMPORTANCE OF AGRICULTURE Since long ago‚ agriculture has been associated with the production of basic food crops. At present agriculture‚ besides farming includes forestry‚ fruit cultivation‚ dairy‚ poultry‚ mushroom‚ bee keeping‚ arbitrary‚ etc. Today‚ marketing‚ processing‚ distribution of agricultural products etc. are all accepted as a part of modern agriculture. Agriculture plays a crucial role in the life of an economy. It is the backbone of our economic system. The following facts clearly
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1) Demonstrate understanding of the terms atom and molecule. Atom= Smallest Unit of Matter Molecule= 2 or more atoms chemically bonded. 2) Describe paper chromatography. 3) Interpret simple chromatograms. A method used to separate a Solution‚ using a Paper and a beaker of water. The Substances in the Paper go up depending on their Mass. We can say that a Solution has the same substance as another solution because they form a line of the same height. 4) Describe methods of separation
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