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Imagine a universe in which the four quantum numbers can have the same possible values as in our universe except that the angular-momentum quantum number can have integral values of 0, 1, 2, . . . n+1, (instead of 0, 1, 2, . . . , n-1). (a) How many elements would be in the first two rows of the periodic table in this universe? (b) What would be the atomic number of the element in the second row and fifth column?

Imagine a universe in which the four quantum numbers
can have the same possible values as in our universe except
that the angular-momentum quantum number can have
integral values of 0, 1, 2, . . . n+1, (instead of 0, 1, 2, . . . ,
n-1).
(a) How many elements would be in the first two rows of
the periodic table in this universe?
(b) What would be the atomic number of the element in
the second row and fifth column?

Grade:12

1 Answers

Sunil Kumar FP
askIITians Faculty 183 Points
9 years ago
For n=1
azimuthal quantum number=0,1,2 i,e s,p,d
no of element=18
in the second row similarly
no of element=32

(b)according to our convention 2ndrow and fifth element is nitrogen
but according to it it would have atomic number of 18 +5=23

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