State the dimension of the nucleus from Rutherford experiment.
According to the nuclear model of an atom, what is the area of the whole mass of the atom located ?
In gold foil experiment number of deflected $\alpha -$ particles at angle $90^o$ is $63$ than number of $\alpha -$ particle deflected at $120^o$ is
The absorption transitions between the first and the fourth energy states of hydrogen atom are $3.$ The emission transitions between these states will be
State the limitations of plum pudding model of the atom.