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)-dblock,7th period
4.both 1. and 3.

Answer 1

option 4 is correct because 89 is in 7th period and 115 belongs to p block