A. Ti2+ and V2+

B. Fe2+ and Cu2+

C. Cr2+ and Fe2+

D. Co2+ and Ti2+

The wavelength of a spectral line emitted by hydrogen atom in the Lyman series is (16/15)hr cm .What is the value of n<sub>2</sub> (R= Rydberg Constant)

The maximum number of sub-levels, orbitals and electrons in N shell of an atom are respectively<br>

What is the correct order of spin only magnetic moment (in BM) of Mn<sup>2+</sup>, Cr<sup>2+</sup> and V<sup>2+</sup> ?

The energy of a photon is 3 x 10<sup>-12</sup> ergs.What is its wavelength in nm ?<br>( h = 6.62 x 10 <sup>-27</sup>ergs-s ; c = 3 x 10 <sup>10</sup> cm/s )

Which one of the following sets correctly represent the increase in the paramagnetic property of the ions