Atoms Test - 64...

Which of the following is true for number of spectral lines in going form Layman series to Pfund series 

In bohr's model, if the atomic radius of the first orbit is $$r_0$$, then the radius of the fourth orbit is 

For principal quantum number $$n=3$$, the possible values of orbital quantum number $$'I$$ are 

Radius of the first orbit of the electron in a hydrogen atom is $$0.53\ A^o$$. So, the radius of the third orbit will be 

In Bohr model of hydrogen atom, the ratio of periods of revolution of an electron in $$n=2$$ and $$n=1$$ orbits is 

The ratio of the speed of the electron in the first Bohr orbit of hydrogen and the speed of light is equal to ( where $$e, h$$ and $$c$$ have their usual meanings)

In hydrogen atom which quantity is integral multiple of $$\dfrac{h}{2\pi}$$

Energy of an electron in an excited hydrogen atom is $$-3.4\ eV$$. Its angular momentum will be : $$h=6.626\times 10^{-34}\ J-s$$ 

Which of the following spectral series in hydrogen atom give spectral line of $$4860\ A^o$$

In hydrogen atom, when electron jumps from second to first orbit, then energy emitted is