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Question

If an electron can have three values of spin quantum numbers (+12,0 and12), which of the following conclusion(s) would be correct?


Correct Answer
A
Li would be in the first period of the periodic table
Your Answer
B
The total number of elements in the third period would have been 27
Correct Answer
C
Zinc (Zn) will belong to s-block in the new periodic table
Correct Answer
D
Ga will be 1st member of d-block in new periodic table

Solution

The correct options are
A Li would be in the first period of the periodic table
C Zinc (Zn) will belong to s-block in the new periodic table
D Ga will be 1st member of d-block in new periodic table
Three spin values would mean that each orbital would now have 3 electrons instead of two. The number of orbitals would be the same as s=1, p=3, d=5. The number of electrons in the sub shells would be 3, 9 and 15 respectively. The new configuration would be:
1s32s32p93s33p94s33d154p95s3
(a) Li would be in the first period of the periodic table as it has 3 electrons.
(b) The total number of elements in the third period would have been 12 since the 3rd period contains s and p block elements only.
(c) Zinc will belong to s-block in the new periodic table with configuration 1s32s32p93s33p94s3
(d) Ga will be 1st member of d-block in new periodic table since it comes after Zn.
 

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