0 and 1.8 = Polar Covalent‚ ~0 = Nonpolar covalent • Moles = Mole * (Number of electrons in element/ 1 mole) • Atoms = Moles * 6.02*10^23‚ Mass number (Z) is the sum of protons plus neutrons • Isotopes of an element have the same number of protons‚ but different numbers of neutrons. • Isotopes of an element have the same number of protons‚ but different numbers of neutrons. • As bond order increases‚ bond length decreases. As bond order increases‚ bond strength increases • Allotropes:
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M12/4/PHYSI/HP3/ENG/TZ2/XX 22126515 Physics Higher level Paper 3 Candidate session number 0 0 Examination code Friday 11 May 2012 (morning) 2 1 hour 15 minutes 2 1 2 – 6 5 1 5 INSTRUCTIONS TO CANDIDATES • • • • • • • Write your session number in the boxes above. Do not open this examination paper until instructed to do so. Answer all of the questions from two of the Options. Write your answers in the boxes provided. A calculator is required for this paper. A clean copy of the
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An Investigation in Monoclonal Antibodies Meena Henen Introduction One of the major medical concerns of the century has been finding a cure for cancer. Scientists have made progress in solving the cancer puzzle with the innovation of procedures such as chemotherapy and various scanning methods‚ but no one has yet found a definite solution. Possibly the newest discovery in the cancer field has been monoclonal antibodies (mAbs). Nicknamed “magic bullets‚” mAbs have
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Chapter 1: Biology- The study of life A Hierarchy of Organization 1. Molecules 2. Organelle 3. Cell 4. Tissue 5. Organ 6. Organism Emergent Properties- Novel properties that emerge as each step up the hierarchy of biological order is taken. Reductionism- Reducing complex systems to simpler components that are more manageable to study. Cells- The lowest level of structure capable of performing all the activities of life‚ all organisms are composed of cells which are the basic units of structure
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INTRODUCTION Protons and neutrons make up a nucleus‚ which is the foundation of nuclear science. Fission and fusion involves the dispersal and combination of elemental nucleus and isotopes‚ and part of nuclear science is to understand the process behind this phenomenon. Adding up the individual masses of each of these subatomic particles of any given element will always give you a greater mass than the mass of the nucleus as a whole. The missing idea in this observation is the concept called nuclear
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I know many people‚ if they could get almost infinite energy for almost nothing‚ they would probably do it. But Nuclear Fusion‚ unlike its cousin‚ Nuclear Fission‚ is quite difficult to achieve. Nuclear fission is the process of splitting large atoms‚ usually Uranium 235‚ to produce massive amounts of energy. The process enacted within all nuclear power plants is Nuclear Fission. Nuclear Fusion‚ on the other hand‚ is the exact opposite; Taking small atoms such as Hydrogen and pushing them together
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------------------------------------------------- Service quality Continuity of supply In 2004‚ water supply was available on average for 18 hours each day in the West Zone of Metro Manila and 21 hours in the East Zone. According to their respective websites‚ the utility responsible for water supply in the East Zone of Metro Manila increased 24-hour water from 26% in 1997 to 98% in 2007‚ whereas in the West Zone‚ 42% of the customers had an uninterrupted supply in 2007. In a 2004 sample of 45
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URANIUM TALENT SEARCH EXAMINATION(UTSE) - 2011 (CBSE/ICSE) Time: 60 minutes(11 am - 12 noon) Class- IX F.M - 180(+3/-1 system) Declaration of Result in the internet(www.theuranium.org) : 15.03.2011 (There are 60 MCQs and each has one correct answer. You are required to darken the appropriate circle in the OMR answer sheet with the help of a HB pencil. Eraser can be used to change any answer. Note that improper darkening will make your answer sheet invalid by the computer. 3 marks will be given
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WAS DARWIN WRONG? An insight of Darwin’s theory of evolution 20th November 2013 Charles Darwin was an English naturalist who studied variation in animals and plants on a five year voyage around the world in the 19th century. He was born in 1809 and died in 1882‚ during his lifetime he managed to present his findings in his book‚ “On the Origin of Species”. Darwin’s findings caused a lot of controversy during his time and the present day‚ they were seen as conflicting with religious beliefs about
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| | Answers are attached Enjoy Biology‚ 8e (Campbell) Chapter 7 Membrane Structure and Function Multiple-Choice Questions 1) Who was/were the first to propose that cell membranes are phospholipid bilayers? A) H. Davson and J. Danielli B) I. Langmuir C) C. Overton D) S. Singer and G. Nicolson E) E. Gorter and F. Grendel 2) Who proposed that membranes are a phospholipid bilayer between two layers of hydrophilic proteins? A) H. Davson and J. Danielli B) I. Langmuir
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