Match the following properties to the type of wave. Longitudinal
waves
?
Medium moves
perpendicular to the
direction of wave motion.
Surface waves
?
Particles of the medium
undergo rarefaction and
compression
Transverse
waves
?
Particles of the medium
move both parallel and
perpendicular to the wave
motion.

These models show the electron structures of two different nonmetal elements. which element is likely more reactive, and why? element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

What is the single most important equation in all of physics?