ATOMIC PHYSICS

         I.            Energy of the n^th orbit is ………. 

• -1/n²     eV

• +13.6eV/n²    eV

• -13.6 eV     

• -13.6/n²   eV

           If a photon is emitted on transition from n^th level to p^th level then-

• n < p   

• n > p   

• n=p

• can’t say.   

           The Bohr radius (r) and and no. of shell (n) are related as..

• r ∝n²    

• r ∝ n      

• r ∝ 1/n²

• r ∝ -1/n²

           The quantum number (q. no.) that indicates the orientation of orbit in space-

• n (principal q. no.)

• l (orbital q. no.)

• m_l (magnetic orbital q. no.) 

• s (spin q. no.) 

         I.            …………… series lies in visible region of the hydrogen spectrum.

         The orbital quantum number describes ………… of the electron orbit.

         An electron has …… quantum numbers according to Vector Atom Model.

         Possible values of m_s are  ½ and …………

        J (total angular momentum) can be positive or negative.

• TRUE

• FALSE

• can't say

        J (total angular momentum) can be positive or negative.

• TRUE

• FALSE

• can't say