Question

Which species shown below is the largest?

        A) S      B) S^2-     C) Cl      D) Cl^-       E) P^3-

Answer 1

N	O	F
P(15)	S(16)	Cl(17)

In periodic table size decreases from Left to Right So size order is P>S>Cl

Anionic species has more size than nuetral species

So among given options anionic species would have more size than nuetral

All given anionic species have same electron so we can compare size by (e/p) ratio here e is total no of electrons and p is total no fo protons

P3-	S2-	Cl-
e/p = 18/15	e/p = 18/16	e/p = 18/17

So e/p is highest for P3- . So P3- has largest size , correct option is (E)