An electron with $+\frac{1}{2}+\backslash frac12$ value for spin quantum number and -1 value for magnetic quantum number can not be present in

The maximum number of electrons that can be accommodated in a subshell is given by

The ratio of ionization energy of H and $B{e}^{3+}Be^\{3+\}$is

The electrons present in K shell of any atom will differ in value of which quantum number

Cathode rays are

The de-Broglie wavelength for particles having same kinetic energy is

The electron level which allows hydrogen to absorb photons but not to emit is

Which of the following ions has the maximum magnetic moment?

In Balmer series of lines of Hydrogen spectrum, the third line from the red end corresponds to which one of the following inter-orbit jumps of the electron for Bohr orbits in an atom of Hydrogen?

The uncertainties in the velocity of two particles A and B are 0.05 and 0.02 $m{s}^{-1}ms^\{-1\}$ respectively. The mass of B is five times to that of A. The ratio of uncertainties in their positions is :