Which statement about Schrödinger’s theory of the atomic model is true? A.
It proved that the nucleus of an atom is positively charged.
B.
It was the first theory to discuss the existence of electrons.
C.
It explained the odds of finding the position of an electron.
D.
It assumed the electron cloud to be heavier than the nucleus.

You are attempting to recrystallize a crude product mixture. you add the appropriate amount of hot solvent and are allowing the solution to slowly cool to room temperature. however, at room temperature no crystals have appeared, which of the following methods should be used to induce crystallization? choose all correct answers. a) place the flask in an ice bath. b) swirl the contents of the flask. c) add a small seed crystal of the desired product. d) scratch the inside of the glassware using a stir rod. it can be multiple choices