The ph of a solution decreases by 2.0 how does the hydronium ion concentration of the solution change?

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

i would say b

explanation:

but i think i would need more information than that