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Q.

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

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a

Partially filled d – orbitals and completely filled s – orbital

b

Completely filled s – orbital and half filled p – orbitals

c

Completely filled s – orbital and half filled d – orbitals

d

Completely filled s and p – orbitals

answer is B.

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Detailed Solution

The outer electronic configuration of an element belongs to 4^th period and 15^th group is ${4s}^{2} {4p}^{3}$

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