15. Which relationship is present in a solution that has a pH of 7? A) [H+] + [OH-] = 7 B) [H+]> [OH-] C) [H+]<[OH-] D) [H+] = [OH-]​

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."

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.