Chemistry - PERIODIC TABLE Question with Solution | TestHub

Atomic number of$\left(B\right)=Z$and is a noble gas

Atomic number of$\left(A\right)=Z-1$(i.e., is a Halogen)

Atomic number$\left(C\right),=Z+1$(i.e., is a alkali metal)

At number of$\left(D\right)=Z+2$(i.e., alkaline earth metal)

Hence, element$\left(A\right)$must be a Halogen, so has highest electron affinity among the given species.$\left(C\right).$is an alkali metal and$\left(D\right)$is an alkaline earth metal