What is the percentage of $\alpha -$ particles that have more than $1^o$ scattering in Geiger-Marsden experiment?
State the dimension of the nucleus from Rutherford experiment.
Why atoms are electrical neutral ?
Ratio of longest wave lengths corresponding to Lyman and Balmer series in hydrogen spectrum is
What was the thickness of the gold foil kept in the Geiger-Marsden scattering experiment?
Difference between nth and $(n +1)^{th}$ Bohr’s radius of $‘H’$ atom is equal to it’s $(n-1)^{th}$ Bohr’s radius. the value of $n$ is: