Among the given electronic configuration.
(i) 
(24 electrons) : 
(ii) 
(24 electrons) : 
(iii) 
(24 electrons) : 
(iv) 
( 19 electrons) : 
(v) 
( 20 electrons) : [Ar] 
How many of them are incorrect electronic configuration if Aufbau rule is not follow?
Text Solution
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Among the given electronic configuration, only four, i.e. (i), (ii), (iii) and (v) are incorrect while
(iv) is correct.
If Aufbau rule is not followed, sub-orbitals are filled in sequence
Their correct forms is Aufbau is not followed
(24 electrons) : 
(24 electrons) : [Ar] 
(24 electrons): [Ar] 
(20 electrons): [Ar] 
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