Atoms Test - 55...

The figure indicates the energy level diagram of an atoms and the origin of six spectrum lines in emission (e.g line no.$$5$$ arises from the transition from level $$B$$ to $$A$$) Which of the following spectral lines will occur in the absorption spectrum?

Find the frequency of revolution of the electron in the first stationary orbit of H-atom 

In hydrogen atom, the electron is making $$6.6\times 10^{15}rev/s$$ around the nucleus in an orbit of radius $$0.528A^0$$. The equivalent magnetic dipole moment is :

What will be relation between first bohr radius of H- atom and D-atom

The Bohr radius of the fifth electron of phosphorus (atomic number = 15) acting as dopant in silicon (relative dielectric constant = 12) is 

The radius of the orbit of an electron in a Hydrogen-like atom is $$3{ a }_{ 0 }$$, where $${ a }_{ 0 }$$ is the Bohr radius. Its orbital angular momentum is $$\frac { 3h }{ 2\pi  } $$. It is given that h is Planck's constant and R is Rydberg constant. The possible wavelength, when the atom de-excites is :

What is the ratio of the shortest wavelength of the Balmer series to the shortest wavelength of the Lyman series ?

The number of bond pair of electrons and lone pair of electrons in $$O_2$$ molecules respectively are

In a cubical vessel $$1m \times 1m\times 1m$$ the gas molecules of diameter $$1.7 \times {10^{ - 8}}\;{\text{cm}}$$ are at a temperature 300 K and a pressure of $${10^{ - 4}}\;{\text{mm}}$$ mercury. The mean free path of the gas molecule is 

Suppose that the potential energy of a hypothetical atom consisting of a proton and an electron is given by U = - Ke$$^{2}$$ / 3 r$$^{3}$$.Then if Bhor's postulates are applied to this atom ,then the radius of the n $$^{th}$$ orbit will be proportional to: