which statement correctly Compares an atom of an Alkali metal with an atom of the alkaline earth metal next to it on the periodic table

Which statement about sound is not true? a. air particles travel with sound waves. b. sound waves cannot travel through a vacuum. c. sound waves exist even if no one hears them. d. air particles vibrate along the path of a sound wave.

What were the success and failures that came to boyle’s excitements?

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust