An ion formed by an element in Group 1, 2, 6 or 7 will have the same electron structure as which of the following?

What is the question

Ithink that’s it’s b

Answer:             1.0  × 10⁻⁵ msolution:                     as we know ph is given as,                                    ph  = -log [h⁺]and,                                    [h⁺]  =  10^-ph    (1)putting value of ph in eq. 1,                                    [h⁺]  =  10⁻⁵                                    [h⁺]  =  1.0  × 10⁻⁵ m

They adding another layer their bahaviors.