What is the national suicide rate for teens?

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?

Fred is studying a substance that is made out of only one element. this means that

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