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  4. The correct order of increasing energy of atomic orbital is

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Q. The correct order of increasing energy of atomic orbital is

Structure of Atom

Solution:

More the $(n + l)$ value ; more will be the energy
image
According to Aufbau principle
Smaller the $(n +l)$; smaller will be energy
For same $(n +l)$; smaller the value of $n$; lesser will be energy
$\therefore $ increasing order $5p < 6s < 4f < 5d$