How many moles of nitrogen would be needed to completely react with 12 moles of hydrogen according to the balanced equation given below?

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 It showed that a nucleus occupies a small part of the whole atom.

Explanation:  Rutherford's Gold Foil experiment explained that there is a particle or space present due to which few of the alpha rays bounced back to the source due to the repulsive forces. Thus he named this heavy particle as nucleus that occupies the small space of the whole atom.

JJ Thomson led to the discovery of electrons.

Dalton's Theory of Atom consisted of the postulates which all atoms or elements are supposed to follow till date.