Which of following describe(s) a way in which radio waves can carry energy?
A. through rock layers, from a source, to a reflector, and then to a receiver
B. through the Earth's atmosphere, from a broadcast tower to a receiver
C. all of these

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.