Question

A,B,C,D are four consecutive elements of a short period. Their first lonization enthalpies are 900, 800, 1086 and 1402 KJ/mol
respectively.
(A) Li, Be, B, C
(B) C, N, O, F
(C) Be, B, C, N
(D) Na, Mg, Al, si​

Answer 1

Answer:

(c)be,b,c,n

because lonization enthalpies are 900 ,800,decred circle cureas

Answer 2

Answer:

I am really not sure but I think it is

C