Atoms and Nucle...

The wave length of the first line of Lyman series for hydrogen atom is equal to that of hydrogen atom is equal to that of second line of Balmar series for a hydrogen like ion. The atomic number Z of hydrogen like ion is

At a certain time, a radio active sample contains 2 × 10²⁰ atoms and disintegration rate is 3 × 10¹⁰ atom persec. when 2 × 10¹⁵ atoms left to decay its disintegation rate will be

Excited hydrogen atom emits a Photon of wave length in returning to the ground state The quantum number n of exulted state is given by

The energy levels of the hydrogen spectrum is shown in figure. There are some transitions A,B,C,D and E. Transition A, B and C respectively represent

In the figure D and E respectively represent

The Rutherford α-particles experiment shows that most of the α-particles pass through almost unscattered while some are scattered through large angles. What information does it give about the structure of the atom

Which of the following is true?

The transition from he state n = 4 to n = 3 in a hydrogen like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition from