CLASS 12
:) PHYSICS
:) CHEMISTRY
:) MATHS
:) BIOLOGY
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Structure of Atom DISCOVERY OF CATHODE RAYS : - To produce cathode ray , discharged tube is used . Discharged Tube : It is long g...
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Some Basic Concepts Of Chemistry # ELEMENTS : - Elements is the purest form of matter . It is made up of only one type of atom . MIXT...
