Chemistry-
General
Easy

Question

In the ground state of cobalt atom (Z = 27) there are ....... unpaired electrons and thus the atom is.......

  1. (a) 2, diamagnetic  
  2. 2, paramagnetic  
  3. (c) 3, diamagnetic  
  4. 3, paramagnetic  

The correct answer is: 3, paramagnetic


    C o minus left square bracket A r right square bracket 3 d to the power of 7 end exponent 4 s to the power of 2 end exponent, it has 3 unpaired e to the power of minus end exponentso it is a paramagnetic

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