Can someone plz help me on this

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

Select the correct answer. wax is a nonpolar substance. in which type of substance is it the most soluble?

In chemistry, the type of an atom (what element it is) is determined by: a) the number of protons it contains in its nucleus. b) the number of neutrons it contains in its nucleus. c) the number of protons it has in a cloud around the nucleus. d) the number of neutrons it has in a cloud around the nucleus. e) the number of electrons it exchanges with its neighbors.