Match List I with List II and select the correct answer.
List I (Isotope)
List II(Characteristic)
A. 4020Ca2040Ca
Stable
B. 13353I53133I
Unstable, β−emitterβ−emitter
C. 12153I53121I
Unstable, positron emitter
D. 23290Th90232Th
Unstable, α−emitterα−emitter
Match the entries in column I with the entries in column II. ElementsElectronic configuration(i) C−4 is highly unstable because(a) It would be difficult for carbon with six protons in its nucleus to hold on just two electrons.(ii) C+4 is achieved by(b) gaining four electrons to its outermost orbit(iii) C+4 is highly unstable because(c) losing four valence electrons(iv) C−4 is achieved by(d) It is difficult for the nucleus with six protons to hold on ten electrons, i.e. four extra electrons
Match List-I with List-II and select the correct answer using the codes given below the lists.