Question

how to remember
aufab principal​

Answer 1

Answer:

The vacant subshell having lowest energy is filled first. When this subshell is filled completely, then the filling of next sub-shell with higher energy starts.

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Answer 2

Explanation:

learn every pair repeat each pair two times. s s ps ps dps dps fdps and s start with 1 n p star with 2 n d start with 3 n f start with 4 arrange this way

Edit 1 - you can use statement for it like

Shyam Shyam Pandit Shyam Pandit Shyam Daata Pandit Shyam Daata Pandit Shyaam Fir Daata Pandit Shyam

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