Please help me I have been getting C’s D’s and F’s please help me

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.

The ammonia molecule in the diagram has the observed bond orientation because

Which of the following is the molecular formula for a simple sugar? a. cooh b. h2o c. oh d. c6h12o6