How many valence electrons does an atom of oxygen have?

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

The particles that are found in the nucleus of an atom are