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Grade: 11
        
 
If aufbaus rule is not followed forCa-20will be placed in which block 
 
11 months ago

Answers : (2)

Arun
22545 Points
							
Z=40Electronic configuration withou afbau principle1s^2 2s^2 2p^6 3s^2 3p^6 3d^2so the last electron enters in d orbital it should be dblock element
 
Regards
Arun
11 months ago
Khimraj
3008 Points
							
Electronic configuration of Ca is 1s22s22p63s23p64s2
Filling of 3d orbital starts after the filling of 4s orbitals. If the aufbau principle had not been followed, the filling of 3d orbital would have been prior to filling of 4s orbital and the electronic configuration of Ca would have been 1s22s22p63s23p64s2  and it belongs to d block.
11 months ago
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