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J.J. Thompson Discovered the Electron — And Unknowingly Electrified Science Forever

By the late 1800s, the scientific world was buzzing with questions about electricity and light. Several researchers were ...
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NCERT Solutions for Class 9 Science Chapter 4 - Structure of the Atom (PDF)

NCERT books offer a number of problems in the form of exercise questions for students to solve which helps them assess their understanding of the topics learned in the chapter. Solving these exercise ...