Radiation refers to energetic waves and particles emitted by a radioactive source. which of the following electromagnetic waves has the lowest energy and longest wavelength? infrared waves radio waves ultraviolet waves gamma waves

Radio waves has the lowest energy and longest wavelength.

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.

What are the choices?