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Q.

What will be the last shell for an element having Z = 117?

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a

n =5

b

n=4

c

n=6

d

n =3

answer is B.

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Detailed Solution

n=4

n	l	n+l
1	1,2 (A,B)	2,3
2	1,2,3 (A,B,C)	3,4,5
3	1,2,3,4	4,5,6,7
4	1,2,3,4,5	5,6,7,8

l	m
1	$- \frac{1}{2}, + \frac{1}{2}$	$\Rightarrow A (2)$
2	-1,0,+1	$\Rightarrow B (3)$
3	$- \frac{3}{2}, - \frac{1}{2}, + \frac{1}{2}, + \frac{3}{2}$	$\Rightarrow C (4)$
4	-2,-1,0,+1,+2	$\Rightarrow D (4)$
5	$- \frac{5}{2}, - \frac{3}{2}, - \frac{1}{2}, + \frac{1}{2}, + \frac{3}{2}, + \frac{5}{2}$	$\Rightarrow E (6)$

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What will be the last shell for an element having Z = 117?