9th Class Chemistry Guess Paper on Chemistry 2020

Important Short Questions What was the concept of Empedocles and Aristotle regarding matter. Differentiate between Empirical Formula and Molecular Formula. Define Free Radical and Formula Unit. Write the Formation of NA+ ion. Explain Auf Bau Principal. Write down the electronic configuration of Potassium 19K39. Explain Rutherford Experiment and discovery of nucleus. Also write its defects. Write down …

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