Which statements are true about the speed of a wave? The speed of a wave is the product of its frequency and wavelength. The speed varies in different materials, depending on how closely or loosely the molecules of the material are packed.

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided