system that described the relationship between atoms and elements. Atoms combining into molecules was another discovery found when Gay Lussac saw that the gases produced twice the volume when combining equal volume of different gases. In 1811‚ Amedeo Avogadro realized that the assumptions that gases remain of single atoms to be wrong and that gases actually remain of multiple atoms‚ molecules. The next discovery was the synthesis of urea in the 19th century when Friedrich Woehler synthesized urea from
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VIHS/ Department of Chemistry Chemistry Revision Unit II (Edexcel) (01) a) When lithium nitrate and sodium nitrate are heated separately‚ both decompose giving oxygen gas as one of the products. (i) Which of these two nitrates would decompose at the lower temperature? .........................................................………………………………………….................... (ii) Give the name of any other product formed when sodium nitrate is heated. .....................................................
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he named ``positive’’ and ``negative’’ HENRY CAVENDISH -discovered and studied hydrogen ALESSANDRO VOLTA -pioneer in study of electricity; invented the first electric battery ANDRÉ MARIE AMPÈRE -father of electrodynamics AMADEO AVOGADRO -developed hypothesis that all gases at same volume‚ pressure‚ and temperature contain same number of atoms HANS CHRISTIAN OERSTED -discovered that a current in a wire can produce magnetic effects SADI CARNOT -founded the science of thermodynamics
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elements. 4. To understand the state of matter (solid‚ liquid and gasese) properties and solid lattice structure. 5. To describe on the kinetic theory of gas‚ gas law and deviation of ideal gas behavior. 6. To explain the rate of reaction‚ rate constant and order of reaction by calculating reaction variables and plotting reaction graph. METHODS OF TEACHING Lectures‚ tutorial‚ laboratory practical and students-led group discussions nd 1 | Last Revised: 22 August 2014 by Leong Shi Qi INSTRUCTIONAL
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A. MATTER * Nature of matter. * Describe the states of matter and explain their conversion in terms of the kinetic particle theory. * Describe and explain diffusion. * Describe dependence of rate of diffusion on molecular mass‚ qualitatively. * Experimental techniques Measurement. * Name appropriate apparatus for the measurement of time‚ temperature‚ mass and volume‚ including burettes‚ pipettes and measuring cylinders. Criteria of purity. * Identify substances
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Henry Moseley (November 23‚ 1887 – August 10‚ 1915) was an English physicist. His main contributions to science were the quantitative justification of the previously empirical concept of atomic number‚ and Moseley’s law. This law advanced chemistry by immediately sorting the elements of the periodic table in a more logical order. It also advanced basic physics by providing independent support for the Bohr model of the Rutherford/Antonius Van den Broek nuclear atom containing positive nuclear charge
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SCORE SCIENCE 10 ONE MARK MODEL QUESTION PAPER CHAPTERWISE Compiled By‚ A. JEBASINGH‚ M. Sc.‚ M.Ed.‚ M.Phil. BT Asst. (Science) Edited By‚ A. SAVARIMUTHU‚ B.Sc.‚ M.A.(Eng).‚ B.Ed. BT Asst. (Science) Typed By‚ J. LOGESH OUR SINCERE THANKS TO Rev. Bro. Dr. M.IRUDHAYAM M.Sc.(Phy).‚ M.Sc.(E&E)‚ M.Sc.(Psy).‚ M.A.(Eng).‚ M.Phil.‚ M.A.(Soc).‚ M.Phil.‚ PGDCA‚ PGDHET‚ PGDEA‚ MBA‚ M.Ed.‚ PhD. HEADMASTER & CORRESPONDENT ST. JOSEPH’S HR. SEC. SCHOOL CHENGALPATTU- 603002 CONTACT
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Unit-1 THE SOLID STATE QUESTIONS VSA QUESTIONS (1 - MARK QUESTIONS) 1. 2. 3. 4. 8. 9. What are anistropic substances. Why are amorphous solids isotropic in nature? Why glass is regarded as an amorphous solid? Define the term ’crystal lattice.’ Define the term voids. What type of stochiometric defect is shown by (i) ZnS and (ii) CsCl? [Hint. : (i) Frenkel defect (ii) Schottky defect] *10. If the formula of a compound is A2B‚ which sites would be occupied by A ions? [Hint. : Number of A ions is
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Study guide Exam 1 Ch 1-5 CH 1 Overview‚ what is evolution‚ what is biology‚ what is life Evolution scientific explanation for: the unity and diversity we see in various organisms the suitability of organisms to their environments is evolution Hierarchy – molecules‚ cells‚ tissue‚ organ‚ organisms‚ populations‚ communities‚ ecosystem‚ biosphere Emergent properties – zooming from molecular level out to see function Reductionism (complex to simple) and Systems Biology (dynamic) Organisms
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plates of a parallel plate system are charged up to 100V. A 4mm thickness dielectric slab is inserted between the plates. Then to maintain the same potential difference‚ the distance between the systems plates are increased by 2mm. find the dielectric constant. 4. A point charge placed at any point on the axis of an electric dipole at some large distance experiences a force F. Find the force acting on the point charge when its distance from the dipole is quadrupled. 5. In the electric field of a point
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