Question

Which element shown less shield effect ?

(A) Group-12, period-4
(B) Group-12, period-3
(C) Group-12, period-2
(D) Group-12, period-5​

Answer 1

Answer:

D is the correct answer mate

Answer 2

B is the option
Because period 2 is inner most orbit than others so strongly attracted by nucleus,shielding effect is less