Hydrogen atom does not emit X-rays because _________________?

Related Mcqs:

Excited atoms return to their ground state in_______________?

A. 10-10s B. 10-8s C. 10-6s D. 10-9s...

Tick the correct statement ?

A. an atom has limited number of ionization potentials but a large number of excitation potentials B. there are as many excitation potentials as there are excited states C. the difference between the energy of the ground sate and any one of the excited states is the measure of excitation energy D. all of above...

The characteristic X-rays spectrum is due to_____________?

A. The illumination of the target metal by ultra-violet radiation B. The bombardment of the target by protons C. The bombardment of target by electrons D. The absorption of radiation by the target metal...

The minimum wavelength of X-rays produced by the bombardment of electrons on the screen of a television set where the accelerating potential is 2.0K V will be______________?

A. 6.2 x 10-10m B. 9.1 x 10-18m C. 3.11 x 10-10m D. 4 x 10-10m...

Maximum frequency in the spectrum from X-ray tube is directly proportional to the______________?

A. Number of incident electron i.e. filament current B. The kinetic energy of the incident electron i.e. the potential difference through which they are accelerated C. The soft target which can easily emit electrons D. All of above are correct...