Among the equations given below, ΔH of which one is equal to IE1 of Ba?
a2−b2 is equal to(a) (a−b)2(b) (a−b)(a−b)(c) (a−b)(a+b)(d) (a+b)(a+b)
Which of the following represent the correct order of decreasing IE1 for Ca, Ba, S, Se and Ar?