Question

On the basis of given part of periodic table,
incorrect statement is :-
(1) A is an alkaline earth metal
(2) Atomic number of B is 103 which belongs to III B group
(3) Atomic number, group no. and period number of D are 72 IVB and 6th respectively
(4) C is a transuranic element.​

Answer 1

Answer:

(3) is incorrect as because hydrogen is also there in the top it may be period 5th