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8. Waste water management Human beings have been abusing the water-bodies around the world by disposing into them all kinds of wastes. We tend to believe that water can wash…

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English for chemistry students 510 multiple choice questions UNIT 1 : PERIODIC TABLE Question 1 Who was the scientist who arranged the elements according to groups of C three?…

Technology Chemistry chapter 3 number2

1.Chapter 3 Elements, Atoms, and Ions2.   3. Alchemy- pseudoscience based upon the belief that cheap metal could be turned into gold Greek philosopher Aristotle proposed…

Education Periodic table - periodic properties

1.Periodic table and periodic propertiesUnit III - Classification of Elements and Periodicity in Properties         Johann Dobereiner classified…

Technology Periodic table and atomic structure

1.PERIODIC TABLE AND ATOMIC STRUCTURE 2. Periodic Table • systematic classification of elements based on properties of the elements 3. Early Classification Dobereiner Mendeleev…

Education Chemistry Book One

1. Chemistry2014FOR CLASS IX SIR. MOHAMMAD AHTISHAM ALI ABDULLAH EDUCATIONAL SOCIETY http://facebook.com/aes.pk 2. 1ContentsQ - 1) DEFINE CHEMISTRY? WRITE THE NAME OF ITS…

Education School of elements

1.   2. Dobereiner arranged elements having similar properties in the increasing order of their atomic weight in a group of three called triads. He found that in these group…

Technology Unit the periodic table2

1. The Periodic Table 2. Periodic Vocabulary Atomic Radius  Metal Electronegativity  Metalloid Family Noble Gas Group  Nonmetal Ionic Radius…

Education Periodic classification of elements by nandish

1. By, Nandish S 10th std Roll no 23 Sri Chaitanya Techno School 2. Classification of elements :- PERIODIC CLASSIFICATION OF ELEMENTS 1) The arranging of elements into different…

Education The perodic table

1. The Periodic Table By Aditi Atmasidha 2. Introduction Many scientists tried to arrange elements in a group or table having certain characteristics to arrange in chronological…