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Q.

An element X belongs to fourth period and fifteenth group of the periodic table. Which one of the following is true regarding the outer electronic configuration of X?

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a

It has partially filled d-orbitals and completely filled s-orbitals

b

It has completely filled s-orbitals and completely  filled p-orbitals

c

It has completely filled s-orbitals and half filled p-orbitals

d

It has half filled d-orbitals and completely filled s-orbitals

answer is C.

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Detailed Solution

The electronic configuration of X can be written as X=1s22s22p63s23p64s23d104p3So element X has completely filled s and d orbitals and half filled p-orbitals.
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An element X belongs to fourth period and fifteenth group of the periodic table. Which one of the following is true regarding the outer electronic configuration of X?