Atoms Test - 50...

If photons of energy $$12.75eV$$ are passing through hydrogen gas in ground state then no of lines in emission spectrum will be 

In a hypothetical Bohr hydrogen, the mass of the electron is doubled. The energy $$E_o$$ and the radius $$r_o$$ of the first orbit will be ($$a_o$$ is the bohr radius)

If an electron has, orbital angular momentum quantum number $$l = 7$$, then it will have an orbital angular momentum equal to

Consider an atom of $${Li}^{2+}$$ which is a uni-electron system and hence Bohr's model is applicable to it.
If $${r}_{0}=$$ radius of first orbit in hydrogen atom, what is the radius of revolution of electron in second excited state in $${Li}^{2+}$$?

The radius of the first orbit of the electron of a hydrogen atom is $$5.3\times 10^{-11}$$m. What is the radius of its second orbit?

The absorption transition between the first and the fourth energy states of hydrogen atom are $$3$$. The emission transition between these states will be:

The wavelengths involved in the spectrum of deuterium $$\left( ^{2}_1D\right)$$ are slightly different from the hydrogen spectrum, because:

Using Bohr's formula for energy quantization, the ionisation potential of the ground state of $$Li^{++}$$ atoms is:

If the difference between $$(n + 1)^{th}$$ Bohr radius and $$n^{th}$$ Bohr radius is equal to the $$(n -1)^{th}$$ Bohr radius then find the value of $$n$$

Energy required for the electron excitation in $$Li^{++}$$ from the first to the third Bohrs orbit: