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Q. What is the total number of electrons that can have the values $n=2, l=1, s=1 / 2$ in the electronic configuration $1 s^{2} 2 s^{2} 2 p^{3} ?$

J & K CETJ & K CET 2013Structure of Atom

Solution:

$n = 2, l= 1, s= 1/2$,
Orbital = $2p^3$
No of electrons $= 3$