What structures are formed when water molecules surrounds individual ions

If a || b and e || f, what is the value of y ?

How many atomic mass units are equal to 1.672×10−24 g of protons?

Four statements about the development of the atomic model are shown below. a: electrons have wavelike properties. b: atoms have small, negatively charged particles. c. the center of an atom is a small, dense nucleus. d: atoms are hard, indivisible spheres. which order of statements represents the historical development of the atomic model? c-d-a-b c-d-b-a d— в-а — с d-b-c-a