Which Of The Following Does Not Characterize X-rays?

To which orbit the electron in the hydrogen atom will jump on absorbing 12.1 eV of energy? 

Nitrogen has the electronic configuration  and not  which is determined by

The valence shell electron of sodium has the quantum numbers

(n, l, m, s)

The ratio of the energy of photon of λ = 2000 Å to that of λ = 4000 Å is

Which of the following has largest de-Broglie wavelength, provided all have equal velocity?

Which of the following relates to photons both as wave motion and as a stream of particles?

The correct set of quantum numbers for the unpaired electron of Cl atom is

The outer shell configuration of the most electronegative element is

Which of the following electronic jump in a hydrogen atom will require the largest amount of energy?

An electron has a speed of 600 m/s with an accuracy of 0.005%. The certainty with which the position of the electron can be located