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The nucleus of an atom consists of ________.
Anode rays were discovered by?
The most electronegative element is________.
The mass of electron as determined by J.J. Thomson is_______.
What is the elements present in urea______?
Neutrons were discovered by?
The inert gas abundantly found in widely distributed is_____?
The M.K.S system was first introduced by______?
Which is not a type of elements?
Which is used in preparation of dynamite?
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