Barium (ba) is in group 2. recall that atoms in group 1 lose one electron to form ions with a 1+ charge what type of ion does barium form?

Volume is a measurement of how fast particles of a substance are moving

Ineed pls urgent 1-20 in order and fully detail step my step.

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