Which ph corresponds with the acidic quality of the rainwater?
a.6
b.7
c.8
d.9

The lower you go, the more acidic. The higher you go, the more alkaline. Your answer would most likely be 6.

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts