Question

Which is mismatched regarding the position of the
element as given below?
(1) X(Z = 89) - f block, 6th period
(2) Y(Z = 100) - f block, 7th period
(3) Z(Z = 115) - d block, 7th period
(4) Both (1) & (3)​

Answer 1

Answer:

(1) (z=89) - f block, 6th period