Atoms and Molecules

State Council of Educational Research and Training, Tamil Nadu (2020) Atoms and Molecules. [Teaching/Learning Resource]

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You have learnt, in your lower classes that matter is around us everywhere. Matter is made of atoms. Curiously the idea of atom was first proposed by the Greek philosophers in the fifth century BC (BCE). But, their theory was more philosophical than scientific. The first scientific theory of the atom was proposed by John Dalton. Few of the postulates of Dalton’s theory about an atom were found incorrect by the later on studies made by J.J. Thomson, Rutherford, Neils Bohr and Schrodinger. In the light of the result of the researches most of the limitations of the Dalton’s theory were removed and a new theory known as the modern atomic theory was put forward.

Item Type: Teaching/Learning Resource
Program: A publication under Free Textbook Programme of Government of Tamil Nadu
Learning outcomes: At the end of the lesson the students will be able to: � acquire the ability to learn about the atoms and molecules. � comprehend atomic mass and molecular mass. � have information about gram atomic mass and gram molecular mass. � perceive the intended meaning of Avogadro’s hypothesis of gases. � interpret the application of Avogadro’s hypothesis. � determine the atomicity of a molecule. � interpret the relation between vapour density and relative molecular mass. � have the facts about the relationship between the volume of a gas and the number of molecules present in it. � grasp the idea of mole concept and solve many problems using it. � calculate the percentage of composition of a compund.
Access: Open
Uncontrolled Keywords: Physics
Subjects: Science General
Curriculam Level: 4. Junior Secondary
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Depositing User: COL Staff
Date Deposited: 12 Apr 2021 05:06
Last Modified: 22 Apr 2021 00:54

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