A spring running horizontally has areas with the coils closer together and areas with them farther apart. A label A points to ar
eas where they are closer together. A label B points to areas where they are farther apart. A label C sits near a bracket connecting the center of two successive areas with the coils farther apart, which are separated by an area of closer coils. Label the parts of the longitudinal wave. Compressions: Rarefactions: Wavelength:
Group 18 is the only group in periodic table in which all the elements are nonmetals. This group contains F, Cl, Br, I and At and also the other name of this group is halogen which means salt producer.
