If the maximum speed of the emitted photoelectrons is 2.52×106 m/s, what wavelength of electromagnetic radiation struck the surface and caused the ejection of the photoelectrons?

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.