Questions and Answers
Who first used symbols to define the quantity of an atom of an element?
Which scientist suggested symbolizing elements with one or two letters from their name?
According to the atomic theory of Dalton, what are all matter composed of?
Which law states that mass can neither be created nor destroyed in a chemical reaction?
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According to the atomic theory of Dalton, what do atoms do in chemical reactions?
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Who postulated the idea of Parmanu as the smallest particles of matter?
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What did Democritus name the indivisible particles obtained when matter is divided?
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Who elaborated the doctrine of Parmanu and its existence in combined form?
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When did scientists recognize the difference between elements and compounds?
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Who laid the foundation of chemical sciences by establishing two important laws of chemical combination?
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