Assertion: Third ionization energy of phosphorus is larger than sulphur. Reason: There is a larger amount of stability associated with filled s- and p- sub-shells (a noble gas electron configuration) which corresponds to having eight electrons in the valence shell of an atom or iron.

Question

Assertion: Third ionization energy of phosphorus is larger than sulphur. Reason: There is a larger amount of stability associated with filled s- and p- sub-shells (a noble gas electron configuration) which corresponds to having eight electrons in the valence shell of an atom or iron. (A) If both A and R are correct and R is the correct explanation of A. (B) If both A and R are correct but R is not the correct expalnation of A. (C) A is true but R is false. (D) A is false but R is true.

Tardigrade Admin · Accepted Answer

Electrons configuration 16 S 2+=1 s 2 2 s 2 2 p 6 3 s 2 3 p 2 and 15 P 2+ =1 s 2 2 s 2 2 p 6 3 s 2 3 p 1. Sulphur has higher nuclear charge and smaller size than that of phosphorus so IE 3 of S > P

Q. Assertion: Third ionization energy of phosphorus is larger than sulphur.
Reason: There is a larger amount of stability associated with filled $s$ - and $p$ - sub-shells (a noble gas electron configuration) which corresponds to having eight electrons in the valence shell of an atom or iron.

If both A and R are correct and R is the correct explanation of A.

If both A and R are correct but R is not the correct expalnation of A.

A is true but R is false.

A is false but R is true.

A and R both are false.

Electrons configuration $_{16} S^{2 +} = 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{2}$ and $_{15} P^{2 +}$ $= 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{1}$ . Sulphur has higher nuclear charge and smaller size than that of phosphorus so $I E_{3}$ of $S > P$

Q. Assertion: Third ionization energy of phosphorus is larger than sulphur. Reason: There is a larger amount of stability associated with filled s- and p- sub-shells (a noble gas electron configuration) which corresponds to having eight electrons in the valence shell of an atom or iron.