In an atom, the total number of electrons having quantum numbers n = 4 ,   | m l | = 1 and m s = &#8211…

In an atom, the total number of electrons having quantum numbers n=4, |ml|=1 and ms=–1/2 is

Solution

n=4 
l=0,1,2,3
ml=1⇒±1
ms=-12
For l=0, ml=0
l=1, ml=-1, 0, +1
l=2, ml=-2,-1, 0,+1,+2
l=3, ml=-3, -2, -1, 0, +1, +2, +3 
So, six electrons can have ml=1 & ms=-12 .
 

Asked in: JEE Advanced 2014 (Paper 1)

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