2. Questions Bank
  3. JEE Main & Advanced
  4. Chemistry
  5. Structure of Atom / परमाणु संरचना

JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Mock Test - Atomic Structure

  • question_answer
    The "spin-only" magnetic moment [in units of Bohr magnet on, (\[{{\mu }_{B}}\])] of \[N{{i}^{{{2}^{+}}}}\] in aqueous solution would be: (At. no. Ni = 28)

    A) 1.73                 

    B) 2.84

    C) 4.90                 

    D) 0

    Correct Answer: B

    Solution :

    [b] \[Ni=28={{[Ar]}^{18}}3{{d}^{8}}4{{s}^{2}};N{{i}^{2+}}={{[Ar]}^{18}}3{{d}^{8}}\]             \[N{{i}^{2+}}\] has two unpaired electrons.             \[\therefore \mu =\sqrt{n(n+2)}\]             \[=\sqrt{8}=2.84BM\]


You need to login to perform this action.
You will be redirected in 3 sec spinner