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Published on: August 12, 2026
After np orbitals are filled, the next orbital filled will be :
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A
After np-orbitals are filled, the next orbital filled will be 
.
According to Aufbau principle, orbitals are filled in order of increasing value of 
).
If two orbitals have same value of 
, then the orbital with lower value of 
will be filled first.
For np orbital, 
For 
s orbital, 
For 
p orbital, 
For 
d orbital, 
For 
s orbital, 
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